Fastener Weight & Count Chart

A free reference from Tesco Steel & Engineering for estimating the weight per piece, weight per 100 pieces and approximate pieces per kilogram of common hex bolts, nuts and washers in metric (M) and BSW (inch) sizes. It also gives the simple calculation formula and material-density multipliers so you can convert a carbon-steel value to stainless steel, brass, aluminium, titanium and more — useful for ordering, packing and freight estimates. All values are approximate, for plain steel of standard pattern.

Weight per Piece (g) Weight per 100 Pieces (kg) Pieces per Kg Metric (M) & BSW Bolts · Nuts · Washers Material-Density Multipliers

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What Is a Fastener Weight & Count Chart?

Definition: A fastener weight & count chart is a quick-reference table that links a fastener's nominal size and length to its weight — given as weight per piece (grams), weight per 100 pieces (kilograms) and approximate pieces per kilogram. It lets you convert instantly between a count of fasteners and a total weight, which is essential for purchasing, kitting, packing and freight. The figures below are approximate values for plain carbon-steel fasteners of standard pattern; use the material multipliers to estimate other alloys.

How Fastener Weight & Piece Count Are Calculated

Every fastener's weight is its volume times the material density. Steel is about 7.85 g/cm³. From the weight of a single piece you can derive the other two figures with simple arithmetic:

Pieces per kg = 1000 ÷ weight per piece (g)

Weight per 100 pieces (kg) = weight per piece (g) ÷ 10

Other-material weight = steel weight × density multiplier

Example: an M10 hex nut weighing about 10 g each gives 1000 ÷ 10 = ~100 nuts per kg and 10 ÷ 10 = 1.0 kg per 100 nuts. In stainless steel (multiplier ~1.02) the same nut is ~10.2 g; in aluminium (~0.34) it is ~3.4 g.

Material-Density Multipliers

Charts are usually tabulated for carbon steel. To estimate the same fastener in another material, multiply the steel weight by the ratio below (carbon steel = 1.00).

Material	Density (g/cm³)	Multiplier (vs carbon steel)
Carbon / MS steel	7.85	1.00 (baseline)
Alloy steel (chrome-moly)	7.85	1.00
Stainless steel (304 / 316)	~8.00	~1.02
Duplex stainless	~7.80	~0.99
Brass	~8.50	~1.08
Copper	~8.90	~1.13
Copper-nickel	~8.90	~1.13
Monel	~8.80	~1.12
Titanium	~4.51	~0.57
Aluminium	~2.70	~0.34

Metric Hexagon Bolts (Full Thread) with Nuts — Estimated Weight per 100 Sets (kg)

Estimated weight of 100 fully-threaded mild-steel metric hex bolt & nut sets (to IS 1363 / 1367), by nominal diameter and length. Values are in kilograms per 100 pieces and are approximate.

Length ↓ / Dia →	M2	M3	M4	M5	M6	M7	M8	M10	M12	M14	M16	M18
3 mm	0.031	–	–	–	–	–	–	–	–	–	–	–
4 mm	0.032	0.081	–	–	–	–	–	–	–	–	–	–
5 mm	0.034	0.086	0.194	–	–	–	–	–	–	–	–	–
6 mm	0.036	0.090	0.201	0.329	0.572	0.837	–	–	–	–	–	–
8 mm	0.040	0.099	0.217	0.349	0.606	0.887	1.338	–	–	–	–	–
10 mm	0.044	0.108	0.232	0.374	0.640	0.937	1.392	–	–	–	–	–
12 mm	0.047	0.117	0.248	0.398	0.674	0.986	1.462	2.943	4.337	–	–	–
16 mm	0.053	0.133	0.278	0.448	0.743	1.080	1.593	3.143	4.617	–	–	–
20 mm	–	0.151	0.309	0.498	0.812	1.185	1.712	3.342	4.897	–	–	–
25 mm	–	0.173	0.348	0.560	0.897	1.304	1.873	3.595	5.258	7.716	10.121	14.124
30 mm	–	–	0.387	0.622	0.983	1.435	2.033	3.843	5.618	8.210	10.799	15.015
35 mm	–	–	0.425	0.684	1.069	1.555	2.194	4.095	5.981	8.711	11.468	15.823
40 mm	–	–	0.464	0.746	1.155	1.685	2.354	4.344	6.345	9.208	12.136	16.611
45 mm	–	–	0.502	0.810	1.243	1.805	2.514	4.596	6.702	9.728	12.853	17.422
50 mm	–	–	0.541	0.870	1.333	1.935	2.664	4.850	7.052	10.225	13.441	18.248
55 mm	–	–	0.580	0.932	1.422	2.056	2.825	5.097	7.418	10.707	14.124	19.157
60 mm	–	–	0.618	0.994	1.502	2.176	2.983	5.359	7.776	11.211	14.837	19.920
65 mm	–	–	0.657	1.056	1.593	2.305	3.145	5.612	8.143	11.710	15.432	20.747
70 mm	–	–	0.696	1.121	1.673	2.426	3.305	5.855	8.503	12.225	16.129	21.552
75 mm	–	–	–	1.181	1.763	2.556	3.465	6.112	8.865	12.626	16.892	22.422
80 mm	–	–	–	1.242	1.853	2.677	3.626	6.361	9.225	13.158	17.544	23.256
85 mm	–	–	–	–	1.933	2.806	3.785	6.614	9.579	13.661	18.182	24.038
90 mm	–	–	–	–	2.023	2.926	3.946	6.868	9.940	14.164	18.868	24.876
100 mm	–	–	–	–	2.194	3.177	4.255	7.364	10.661	15.152	20.161	26.455
110 mm	–	–	–	–	2.361	–	4.579	7.886	11.390	16.181	21.645	28.249
120 mm	–	–	–	–	2.734	–	4.950	8.375	12.136	17.182	22.936	29.940
130 mm	–	–	–	–	2.865	–	5.297	8.881	12.821	18.182	24.155	31.646
140 mm	–	–	–	–	3.012	–	5.593	9.381	13.514	19.231	25.641	33.333
150 mm	–	–	–	–	3.175	–	5.869	9.881	14.245	20.243	27.027	34.722
160 mm	–	–	–	–	–	–	–	10.040	14.620	–	28.571	36.496
170 mm	–	–	–	–	–	–	–	10.395	15.528	–	29.940	38.168
180 mm	–	–	–	–	–	–	–	11.261	16.340	–	30.864	39.683
190 mm	–	–	–	–	–	–	–	–	17.007	–	32.258	41.667
200 mm	–	–	–	–	–	–	–	12.165	17.794	–	33.113	43.103
225 mm	–	–	–	–	–	–	–	–	19.305	–	36.765	–
250 mm	–	–	–	–	–	–	–	14.749	21.645	–	40.000	–
300 mm	–	–	–	–	–	–	–	–	24.631	–	47.170	–

Metric Hexagon Bolts (Full Thread) with Nuts — Large Diameters M20–M36

Continuation of the full-thread metric chart for the larger diameters M20 to M36 (kg per 100 bolt & nut sets, approximate).

Length ↓ / Dia →	M20	M22	M24	M27	M30	M33	M36
25 mm	18.727	–	–	–	–	–	–
30 mm	19.763	–	–	–	–	–	–
35 mm	20.833	25.381	–	–	–	–	–
40 mm	21.834	26.596	34.965	–	–	–	–
45 mm	22.831	27.933	36.496	–	–	–	–
50 mm	24.038	29.240	38.168	53.763	72.464	92.593	–
55 mm	25.000	30.675	39.370	56.180	74.627	96.154	–
60 mm	26.042	31.847	40.984	57.471	76.923	98.039	125.000
65 mm	27.027	33.113	42.735	60.241	79.365	102.041	131.579
70 mm	28.090	34.483	44.248	61.728	81.967	104.167	135.135
75 mm	29.070	35.714	45.872	64.103	84.746	108.696	138.889
80 mm	30.303	37.037	47.170	65.789	87.719	111.111	142.857
85 mm	31.250	38.168	48.544	67.568	89.286	113.636	147.059
90 mm	32.258	39.683	50.000	69.444	92.593	116.279	151.515
100 mm	34.483	42.373	53.191	73.529	96.154	121.951	156.250
110 mm	36.496	45.045	56.180	78.125	102.041	128.205	166.667
120 mm	38.462	47.619	59.524	81.967	106.383	135.135	172.414
130 mm	40.984	50.000	62.500	86.207	111.111	142.857	178.571
140 mm	42.735	52.632	65.789	89.286	116.279	147.059	185.185
150 mm	45.045	55.556	68.493	94.340	121.951	151.515	192.308
160 mm	47.170	57.471	71.429	98.039	128.205	161.290	200.000
170 mm	49.020	60.241	74.627	102.041	131.579	166.667	208.333
180 mm	51.020	62.500	79.365	106.383	135.135	178.571	217.391
190 mm	53.191	65.789	80.645	111.111	142.857	178.571	227.273
200 mm	54.945	68.493	84.746	113.636	147.059	185.185	227.273
225 mm	60.241	–	92.593	–	156.250	–	–
250 mm	65.789	–	100.000	–	172.414	–	–
300 mm	78.125	–	113.636	–	192.308	–	–

Metric Hexagon Bolts (Part / Half Thread) with Nuts — Estimated Weight per 100 Sets (kg)

Estimated weight of 100 part-threaded (half-thread) mild-steel metric hex bolt & nut sets (to IS 1363 / 1367), by nominal diameter and length, in kilograms per 100 pieces (approximate).

Length ↓ / Dia →	M5	M6	M8	M10	M12	M14	M16	M18	M20	M22
16 mm	0.448	0.743	1.590	3.211	–	–	–	–	–	–
20 mm	0.598	0.812	1.711	3.411	4.892	–	–	–	–	–
25 mm	0.660	0.897	1.871	3.660	5.252	8.170	–	–	–	–
30 mm	0.737	1.010	2.070	3.912	5.574	9.690	10.707	–	18.657	–
35 mm	0.804	1.120	2.271	4.223	5.974	10.000	11.416	16.026	19.608	–
40 mm	0.881	1.230	2.470	4.533	6.410	10.288	12.107	16.667	20.747	–
45 mm	0.958	1.340	2.671	4.840	6.859	10.504	12.821	17.241	21.739	–
50 mm	1.030	1.450	2.870	5.155	7.299	11.261	13.624	17.857	22.727	28.409
55 mm	–	1.560	3.071	5.464	7.740	11.628	14.409	18.868	23.810	30.120
60 mm	–	1.670	3.270	5.774	8.183	12.255	15.244	20.000	25.126	32.051
65 mm	–	1.781	3.472	6.083	8.621	12.626	16.026	21.008	26.455	34.014
70 mm	–	1.890	3.671	6.394	9.058	12.987	16.835	22.124	27.778	35.461
75 mm	–	2.000	3.873	6.702	9.506	13.228	17.606	23.256	29.070	39.063
80 mm	–	2.111	4.072	7.013	10.000	13.889	18.248	24.510	30.303	40.000
90 mm	–	–	4.472	7.634	10.917	14.925	19.841	26.042	33.113	41.667
100 mm	–	–	4.873	8.251	11.820	16.340	21.459	27.778	35.714	46.296
110 mm	–	–	–	8.881	12.723	17.730	23.041	31.250	38.168	47.170
120 mm	–	–	–	9.506	13.624	18.797	24.631	32.895	40.984	50.000
130 mm	–	–	–	10.101	14.535	20.000	26.316	34.722	43.478	52.632
140 mm	–	–	–	10.707	15.432	20.833	27.933	35.461	46.296	55.556
150 mm	–	–	–	11.312	16.340	22.222	29.412	37.594	48.544	58.824
160 mm	–	–	–	11.905	17.241	24.272	31.056	40.984	50.505	61.728
170 mm	–	–	–	12.500	18.116	–	32.680	–	53.191	64.935
180 mm	–	–	–	13.123	19.011	26.882	34.247	–	55.556	67.568
190 mm	–	–	–	13.736	19.920	–	35.971	–	58.140	70.423
200 mm	–	–	–	14.327	20.833	29.586	37.594	49.020	60.976	73.529
220 mm	–	–	–	15.528	22.624	–	40.650	–	65.789	79.365
240 mm	–	–	–	16.722	24.510	–	43.860	–	71.429	84.746
250 mm	–	–	–	17.301	25.381	–	45.455	–	74.627	87.719
260 mm	–	–	–	17.921	26.316	–	47.170	–	76.923	90.909
280 mm	–	–	–	19.157	28.090	–	50.505	–	81.967	98.039
300 mm	–	–	–	20.325	29.940	–	53.763	–	87.719	104.167
320 mm	–	–	–	–	31.646	–	56.818	–	92.593	–
340 mm	–	–	–	–	33.557	–	60.241	–	98.039	–
360 mm	–	–	–	–	35.211	–	63.291	–	104.167	–
380 mm	–	–	–	–	37.037	–	66.667	–	108.696	–
400 mm	–	–	–	–	39.063	–	69.444	–	113.636	–

⚠ Approximate values: figures are estimated weights for plain mild-steel hex bolt-and-nut sets of standard pattern; head type, exact thread length, tolerance class and any plating change the real weight. For other materials apply the density multiplier above (e.g. ×1.02 stainless, ×0.34 aluminium). Confirm critical or commercial weights against certified data.

Steel Hex Bolts (Half Threaded) Without Nuts — Estimated Weight per 100 Pieces (kg)

Estimated weight of 100 part-threaded (half-thread) mild-steel metric hex bolts, supplied without nuts, by nominal diameter and length. Values are in kilograms per 100 pieces and are approximate — subtract these from the bolt-with-nut figures above to estimate the nut share, or use them directly when ordering bolts alone.

Length ↓ / Dia →	M6	M8	M10	M12	M14	M16	M18	M20	M22	M24	M27	M30	M33	M36	M39	M42	M45	M48
25 mm	0.714	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–
30 mm	0.822	1.587	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–
35 mm	0.935	1.779	3.145	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–
40 mm	1.035	1.976	3.436	4.936	–	–	–	–	–	–	–	–	–	–	–	–	–	–
45 mm	1.149	2.165	3.745	5.319	–	9.881	–	–	–	–	–	–	–	–	–	–	–	–
50 mm	1.250	2.358	4.049	5.714	8.039	10.638	–	–	22.727	27.778	39.370	51.546	65.789	80.645	–	–	–	–
55 mm	1.351	2.551	4.367	6.098	8.503	11.442	–	19.231	23.810	29.412	40.984	54.348	68.493	84.746	–	–	–	–
60 mm	1.462	2.740	4.651	6.494	9.091	12.255	16.026	20.492	25.000	31.250	43.103	56.818	70.423	87.719	111.111	–	–	–
65 mm	1.577	2.941	4.950	6.897	10.000	13.021	16.892	21.739	26.596	33.333	45.045	59.524	73.529	92.593	113.636	–	–	–
70 mm	1.672	3.030	5.236	7.278	10.616	13.850	18.116	22.936	27.933	35.211	46.729	61.728	76.923	96.154	119.048	142.857	–	–
75 mm	1.773	3.257	5.531	7.657	11.161	14.577	18.868	24.155	29.412	37.037	48.544	63.291	79.365	102.041	125.000	147.059	–	–
80 mm	1.887	3.509	5.862	8.065	11.765	15.385	19.685	25.381	30.864	39.063	50.000	66.667	83.333	106.383	131.579	151.515	192.308	–
90 mm	2.083	3.846	6.410	8.803	12.255	16.892	22.026	27.778	33.784	42.735	55.556	71.429	89.286	111.111	138.889	161.290	200.000	227.273
100 mm	2.273	4.202	6.993	9.579	13.624	18.450	24.038	30.120	36.765	46.296	60.241	76.923	96.154	119.048	147.059	172.414	208.333	238.095
110 mm	2.500	4.630	7.519	10.846	14.881	19.920	25.510	32.468	40.000	50.000	65.789	83.333	104.167	125.000	151.515	185.185	217.391	250.000
120 mm	2.778	5.144	8.104	12.500	16.393	21.552	27.027	34.965	43.478	53.191	69.444	87.719	111.111	131.579	156.250	192.308	227.273	277.778
130 mm	2.959	5.405	8.651	13.441	17.606	23.041	29.940	37.313	45.872	56.180	73.529	92.593	119.048	142.857	172.414	208.333	238.095	294.118
140 mm	3.155	5.682	9.259	14.493	18.939	24.631	33.333	40.000	48.544	58.824	78.125	100.000	125.000	151.515	185.185	217.391	250.000	312.500
150 mm	3.356	5.814	10.060	15.291	19.841	26.178	34.722	42.373	51.546	62.500	81.967	102.041	128.205	156.250	192.308	227.273	263.158	312.500
160 mm	3.571	–	10.989	16.129	21.739	27.778	36.232	45.045	54.348	65.789	86.207	108.696	135.135	166.667	200.000	238.095	277.778	333.333
180 mm	–	–	11.628	16.949	24.390	30.864	40.000	50.000	60.241	73.529	96.154	121.951	151.515	178.571	217.391	263.158	312.500	357.143
200 mm	–	–	12.821	18.868	27.027	33.784	44.248	54.945	66.667	80.645	104.167	131.579	166.667	200.000	238.095	294.118	333.333	384.615
225 mm	–	–	14.286	20.408	–	37.879	–	60.241	73.529	87.719	116.279	142.857	178.571	217.391	263.158	312.500	357.143	416.667
250 mm	–	–	15.625	23.810	–	41.667	–	66.667	80.645	98.039	128.205	156.250	200.000	227.273	294.118	333.333	384.615	454.545
275 mm	–	–	17.241	26.316	–	45.872	–	72.464	87.719	106.383	135.135	166.667	208.333	250.000	312.500	357.143	416.667	500.000
300 mm	–	–	–	27.322	–	49.505	–	79.365	96.154	116.279	147.059	185.185	217.391	277.778	333.333	384.615	454.545	500.000

Steel Hex Bolts (Half UNC Threaded) Without Nuts — Estimated Weight per 100 Pieces (kg)

The chart below covers part-threaded steel hexagon bolts cut to inch-series UNC (Unified National Coarse) threads, supplied without nuts. Diameters run from 1/4″ to 2″ and lengths from 3/4″ to 20″; figures are indicative weights in kilograms per 100 pieces. Use these values when ordering imperial bolting for ASME B16.5 flange joints where nuts are sourced separately. A dash means that diameter–length combination is not a standard production size.

Length ↓ / Dia →	1/4″	5/16″	3/8″	7/16″	1/2″	5/8″	3/4″	7/8″	1″	1.1/8″	1.1/4″	1.1/2″	1.3/4″	2″
3/4″	0.732	–	–	–	–	–	–	–	–	–	–	–	–	–
7/8″	0.795	1.401	–	–	–	–	–	–	–	–	–	–	–	–
1″	0.868	1.479	1.984	–	–	–	–	–	–	–	–	–	–	–
1.1/4″	1.071	1.712	2.320	4.167	5.181	8.803	–	–	–	–	–	–	–	–
1.1/2″	1.160	1.946	2.660	4.587	5.800	9.804	15.432	–	–	–	–	–	–	–
1.3/4″	1.307	2.183	3.003	5.000	6.410	10.799	16.502	21.930	–	–	–	–	–	–
2″	1.458	2.410	3.344	5.388	7.013	11.820	17.921	23.810	33.557	–	–	–	–	–
2.1/4″	1.603	2.646	3.676	5.794	7.634	12.821	19.380	25.773	36.232	–	–	–	–	–
2.1/2″	1.751	2.874	4.016	6.196	8.237	13.812	20.833	27.624	38.760	51.020	67.568	104.167	151.515	217.391
3″	2.041	3.344	4.695	7.013	9.434	15.823	23.697	31.447	43.103	57.471	75.758	113.636	166.667	238.095
3.1/2″	2.336	3.817	5.376	7.813	10.638	17.794	26.596	35.211	49.020	64.103	84.746	125.000	185.185	250.000
4″	2.632	4.274	6.061	8.621	11.905	19.920	29.412	39.370	53.763	70.423	90.909	135.135	200.000	277.778
4.1/2″	2.924	4.753	6.729	9.434	13.158	21.186	31.250	42.735	56.818	76.923	98.039	142.857	217.391	294.118
5″	3.205	5.208	7.407	10.246	14.706	23.148	34.014	46.729	64.103	81.967	106.383	161.290	238.095	312.500
6″	3.817	6.150	8.741	11.848	16.393	27.027	39.683	54.945	72.464	94.340	125.000	185.185	277.778	357.143
7″	–	–	10.101	–	18.182	30.675	46.729	64.935	81.967	111.111	138.889	208.333	312.500	384.615
8″	–	–	11.416	–	21.739	34.247	50.505	67.568	90.909	121.951	151.515	238.095	333.333	454.545
9″	–	–	12.821	–	23.256	38.462	58.824	76.923	102.041	128.205	166.667	263.158	384.615	500.000
10″	–	–	14.286	–	25.000	43.478	63.291	84.746	113.636	138.889	185.185	277.778	416.667	555.556
11″	–	–	–	–	27.933	46.296	67.568	92.593	121.951	151.515	200.000	294.118	416.667	555.556
12″	–	–	17.241	–	31.447	49.505	72.464	100.000	131.579	161.290	208.333	312.500	454.545	625.000
14″	–	–	–	–	35.971	56.818	83.333	113.636	151.515	192.308	238.095	357.143	500.000	714.286
16″	–	–	–	–	41.667	64.935	94.340	131.579	172.414	217.391	277.778	416.667	555.556	833.333
18″	–	–	–	–	45.455	72.464	106.383	147.059	192.308	238.095	312.500	454.545	625.000	–
20″	–	–	–	–	50.000	80.645	119.048	161.290	217.391	263.158	357.143	500.000	714.286	–

Hexagonal Socket Head Cap Screws to IS 2269:2006 / ISO 4762:2004 (DIN 912) — Estimated Weight per 100 Pieces (kg)

Socket head cap screws (Allen cap screws) have a cylindrical head with an internal hexagon drive and are made to IS 2269:2006, ISO 4762:2004 and the equivalent DIN 912 dimensional standards, typically in property class 8.8, 10.9 or 12.9 alloy steel. The matrix below lists indicative weights in kilograms per 100 screws for diameters M2 through M64 and lengths from 3 mm to 300 mm. A dash means that diameter–length combination is not a standard catalogue size.

Length ↓ / Dia →	M2	M3	M4	M5	M6	M8	M10	M12	M14	M16	M20	M24	M30	M36	M42	M48	M56	M64
3 mm	0.0155	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–
4 mm	0.0175	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–
5 mm	0.0195	0.067	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–
6 mm	0.0215	0.071	0.150	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–
8 mm	0.0255	0.080	0.165	0.245	–	–	–	–	–	–	–	–	–	–	–	–	–	–
10 mm	0.0295	0.088	0.180	0.270	0.470	–	–	–	–	–	–	–	–	–	–	–	–	–
12 mm	0.0355	0.096	0.195	0.295	0.507	1.09	–	–	–	–	–	–	–	–	–	–	–	–
16 mm	0.0415	0.116	0.225	0.345	0.575	1.21	2.09	–	–	–	–	–	–	–	–	–	–	–
20 mm	0.0495	0.136	0.265	0.401	0.653	1.34	2.29	3.21	–	–	–	–	–	–	–	–	–	–
25 mm	–	0.161	0.315	0.478	0.759	1.50	2.54	3.57	4.80	7.13	–	–	–	–	–	–	–	–
30 mm	–	0.186	0.365	0.555	0.830	1.69	2.79	3.93	5.30	7.78	12.8	–	–	–	–	–	–	–
35 mm	–	–	0.415	0.632	0.991	1.89	3.04	4.29	5.80	8.44	13.9	–	–	–	–	–	–	–
40 mm	–	–	0.465	0.709	1.100	2.09	3.29	4.65	6.30	9.10	15.0	27.0	–	–	–	–	–	–
45 mm	–	–	–	0.786	1.210	2.29	3.61	5.01	6.80	9.76	16.1	28.5	50.0	–	–	–	–	–
50 mm	–	–	–	0.863	1.320	2.49	3.93	5.45	7.30	10.60	17.2	30.0	52.7	–	–	–	–	–
55 mm	–	–	–	–	1.430	2.69	4.25	5.89	7.80	11.40	18.3	31.6	55.4	87	–	–	–	–
60 mm	–	–	–	–	1.540	2.89	4.57	6.34	8.40	12.20	19.4	33.0	58.1	91	137	–	–	–
65 mm	–	–	–	–	–	3.10	4.89	6.78	9.00	13.00	20.5	34.5	60.8	95	142	–	–	–
70 mm	–	–	–	–	–	3.30	5.21	7.13	9.60	13.80	21.6	36.3	63.5	99	147	204	–	–
80 mm	–	–	–	–	–	3.70	5.85	8.02	10.80	15.40	24.1	39.9	69.0	107	158	218	334	–
90 mm	–	–	–	–	–	–	6.49	8.91	12.00	17.00	26.6	43.5	74.5	115	168	232	353	522
100 mm	–	–	–	–	–	–	7.12	9.80	13.20	18.6	29.1	47.1	80.0	123	179	246	372	547
110 mm	–	–	–	–	–	–	–	10.70	14.40	20.20	31.6	50.7	85.5	131	189	260	392	573
120 mm	–	–	–	–	–	–	–	11.60	15.60	21.80	34.1	54.3	91.0	139	200	274	411	598
130 mm	–	–	–	–	–	–	–	–	16.80	23.40	36.6	57.9	96.5	147	210	288	430	623
140 mm	–	–	–	–	–	–	–	–	18.00	25.00	39.1	61.5	102	155	221	302	449	649
150 mm	–	–	–	–	–	–	–	–	–	26.60	41.6	65.1	108	163	232	316	468	674
160 mm	–	–	–	–	–	–	–	–	–	28.20	44.1	68.7	113	171	242	330	488	690
180 mm	–	–	–	–	–	–	–	–	–	–	49.1	75.9	124	187	264	359	527	725
200 mm	–	–	–	–	–	–	–	–	–	–	54.1	83.1	135	203	286	387	565	775
220 mm	–	–	–	–	–	–	–	–	–	–	–	90.3	146	219	308	415	604	825
240 mm	–	–	–	–	–	–	–	–	–	–	–	97.5	157	225	330	443	642	875
260 mm	–	–	–	–	–	–	–	–	–	–	–	–	168	241	352	471	681	926
280 mm	–	–	–	–	–	–	–	–	–	–	–	–	179	257	374	499	720	976
300 mm	–	–	–	–	–	–	–	–	–	–	–	–	190	273	396	527	758	1030

Allen CSK (Countersunk) Head Screws to IS 6761:1994 / ISO 10642 (DIN 7991) — Estimated Weight per 100 Pieces (kg)

Allen countersunk (CSK) head screws have a flat 90° countersunk head with an internal hexagon drive, letting the head sit flush with the mating surface. They are produced to IS 6761:1994, ISO 10642 and the equivalent DIN 7991 standards. The chart below gives indicative weights in kilograms per 100 screws for diameters M3 through M24 and lengths from 8 mm to 100 mm; a dash marks a non-standard diameter–length combination. Note that a flush CSK head weighs less than the cylindrical head of a cap screw of the same size, so do not interchange the two charts when estimating despatch weight.

Length ↓ / Dia →	M3	M4	M5	M6	M8	M10	M12	M16	M20	M24
8 mm	0.47	0.92	1.60	2.35	–	–	–	–	–	–
10 mm	0.56	1.07	1.85	2.70	5.47	–	–	–	–	–
12 mm	0.65	1.23	2.10	3.05	6.10	10.1	–	–	–	–
16 mm	0.83	1.53	2.59	3.76	7.35	12.1	–	–	–	–
20 mm	1.00	1.84	3.09	4.46	8.60	14.1	21.2	–	–	–
25 mm	1.35	2.23	3.71	5.34	10.2	16.6	24.8	–	–	–
30 mm	1.63	2.9	4.33	6.22	11.7	19.1	28.5	51.8	–	–
35 mm	–	3.4	5.43	7.10	13.3	21.6	32.1	58.4	91.4	–
40 mm	–	3.9	6.20	8.83	14.8	24.1	35.7	65.1	102	–
50 mm	–	–	7.74	11.00	19.9	30.1	43.0	78.4	123	179
60 mm	–	–	–	–	24.8	35.7	54.0	91.7	143	209
70 mm	–	–	–	–	–	41.2	62.9	111	164	239
80 mm	–	–	–	–	–	–	–	127	200	269
90 mm	–	–	–	–	–	–	–	143	226	299
100 mm	–	–	–	–	–	–	–	–	253	340

Low Head Socket Screws DIN 6912 / DIN 7984 — Estimated Weight per 100 Pieces (kg)

Low head socket screws are made to DIN 6912 (with pilot recess) and DIN 7984, with a cylindrical head roughly two-thirds the height of a standard DIN 912 cap screw — the choice where vertical clearance above the joint is restricted. The matrix below gives indicative weights in kilograms per 100 screws for diameters M4 through M36 and lengths from 10 mm to 200 mm. A dash marks a non-standard diameter–length combination. The shallower head also means a reduced hex socket, so use the correct key size to avoid rounding the drive.

Length ↓ / Dia →	M4	M5	M6	M8	M10	M12	M14	M16	M18	M20	M22	M24	M27	M30	M33	M36
10 mm	0.13	0.22	0.36	–	–	–	–	–	–	–	–	–	–	–	–	–
12 mm	0.15	0.25	0.39	0.77	–	–	–	–	–	–	–	–	–	–	–	–
16 mm	0.19	0.31	0.45	0.88	1.55	2.23	–	–	–	–	–	–	–	–	–	–
20 mm	0.23	0.37	0.52	1.02	1.79	2.55	3.79	5.25	–	–	–	–	–	–	–	–
25 mm	0.27	0.44	0.62	1.25	2.02	2.95	4.25	5.65	7.70	–	–	–	–	–	–	–
30 mm	0.32	0.51	0.73	1.40	2.20	3.25	4.80	6.30	8.46	10.8	–	–	–	–	–	–
35 mm	0.34	0.58	0.83	1.57	2.55	3.65	5.30	6.97	9.33	11.8	–	–	–	–	–	–
40 mm	0.42	0.66	0.95	1.75	2.85	4.0	5.80	7.87	10.2	12.8	18.5	–	–	–	–	–
50 mm	0.52	0.73	1.15	2.15	3.48	4.8	6.95	9.15	11.9	15.0	21.5	–	–	–	–	–
60 mm	–	0.90	1.36	2.53	4.03	5.7	8.20	10.7	13.8	17.2	24.5	26.3	–	–	–	–
70 mm	–	–	1.57	2.901	4.60	6.5	9.25	12.2	15.7	19.6	27.5	29.8	44.5	49.8	–	–
80 mm	–	–	–	3.28	5.25	7.2	10.4	14.0	17.8	22.2	30.5	33.3	49.0	55.2	79.3	–
90 mm	–	–	–	–	5.78	8.0	11.6	15.4	19.6	24.5	33.5	36.9	53.5	60.7	86.0	100.0
100 mm	–	–	–	–	–	8.8	12.7	16.9	21.5	26.9	36.5	40.7	58.0	66.2	92.7	108.0
110 mm	–	–	–	–	–	–	13.9	18.3	23.5	29.2	39.5	43.9	62.5	71.7	99.4	116.0
120 mm	–	–	–	–	–	–	15.1	19.8	25.5	31.6	42.5	47.4	67.0	77.2	106.0	124.0
130 mm	–	–	–	–	–	–	–	21.2	27.5	34.2	45.5	51.0	71.5	82.7	113.0	132.0
140 mm	–	–	–	–	–	–	–	22.6	29.5	36.8	48.5	54.5	76.0	88.0	119.0	140.0
150 mm	–	–	–	–	–	–	–	–	31.5	39.4	51.5	58.0	80.5	94.0	125.0	147.0
160 mm	–	–	–	–	–	–	–	–	–	42.2	54.5	61.6	85.0	99.0	132.0	155.0
170 mm	–	–	–	–	–	–	–	–	–	44.8	57.5	65.1	89.5	105.0	138.0	163.0
180 mm	–	–	–	–	–	–	–	–	–	47.4	60.5	68.7	94.0	110.0	145.0	171.0
190 mm	–	–	–	–	–	–	–	–	–	–	63.5	72.2	99.5	116.0	151.0	179.0
200 mm	–	–	–	–	–	–	–	–	–	–	66.5	75.8	103.0	121.0	158.0	187.0

Hexagonal Socket Set Screws (Grub Screws) with Knurled Cup Point to IS 6094 (Part 4):2006 / ISO 4029:2003 (DIN 916) — Estimated Weight per 100 Pieces (kg)

Socket set screws — commonly called grub screws — are headless fasteners threaded along their full length and driven by an internal hexagon, used to lock pulleys, couplings, collars and gears onto shafts. The knurled cup point variant covered here bites into the shaft for extra holding power and is standardised in IS 6094 (Part 4):2006, ISO 4029:2003 and the equivalent DIN 916. With no head, these are the lightest fasteners on this page: the chart gives indicative weights in kilograms per 100 pieces for M1.6 through M24 and lengths from 2 mm to 60 mm. A dash marks a non-standard diameter–length combination.

Length ↓ / Dia →	M1.6	M2	M2.5	M3	M4	M5	M6	M8	M10	M12	M16	M20	M24
2 mm	0.0019	0.0029	–	–	–	–	–	–	–	–	–	–	–
2.5 mm	0.0025	0.0037	0.0063	–	–	–	–	–	–	–	–	–	–
3 mm	0.0029	0.0044	0.0075	0.010	–	–	–	–	–	–	–	–	–
4 mm	0.0037	0.0059	0.0100	0.014	0.023	–	–	–	–	–	–	–	–
5 mm	0.0046	0.0074	0.0125	0.018	0.0305	0.042	–	–	–	–	–	–	–
6 mm	0.0054	0.0089	0.0150	0.022	0.038	0.054	0.074	–	–	–	–	–	–
8 mm	0.0070	0.0119	0.0199	0.030	0.053	0.078	0.109	0.188	–	–	–	–	–
10 mm	–	0.0148	0.0249	0.038	0.068	0.102	0.144	0.251	0.372	–	–	–	–
12 mm	–	–	0.0299	0.046	0.083	0.126	0.179	0.314	0.473	0.67	–	–	–
16 mm	–	–	–	0.062	0.113	0.174	0.249	0.440	0.673	0.95	1.57	–	–
20 mm	–	–	–	–	0.140	0.222	0.319	0.566	0.872	1.23	2.09	3.13	–
25 mm	–	–	–	–	–	0.282	0.407	0.724	1.120	1.58	2.74	4.14	5.52
30 mm	–	–	–	–	–	–	0.494	0.881	1.370	1.93	3.39	5.17	7.03
35 mm	–	–	–	–	–	–	–	1.040	1.620	2.27	4.04	6.20	8.53
40 mm	–	–	–	–	–	–	–	1.200	1.870	2.62	4.69	7.23	10.00
45 mm	–	–	–	–	–	–	–	–	2.120	2.97	5.33	8.26	11.50
50 mm	–	–	–	–	–	–	–	–	2.360	3.32	5.98	9.26	13.00
55 mm	–	–	–	–	–	–	–	–	–	3.66	6.63	10.30	14.50
60 mm	–	–	–	–	–	–	–	–	–	4.01	7.28	11.40	16.00

Round Head Rivets — Estimated Weight per 100 Pieces (kg)

Round head (snap head) rivets are solid permanent fasteners with a domed head, hot- or cold-driven in structural steelwork, tanks, railway wagons and general fabrication. The chart below gives indicative weights in kilograms per 100 rivets for shank diameters 1/4″ through 1″ and lengths from 1/2″ to 4″, measured under the head. A dash marks a non-standard diameter–length combination. Remember to allow extra shank length for forming the closing head — typically about 1.5 times the diameter.

Length ↓ / Dia →	1/4″	5/16″	3/8″	7/16″	1/2″	5/8″	3/4″	7/8″	1″
1/2″	0.570	0.961	1.555	–	–	–	–	–	–
5/8″	0.661	1.079	1.747	–	–	–	–	–	–
3/4″	0.727	1.228	1.933	2.841	3.623	–	–	–	–
7/8″	0.800	1.323	2.096	3.064	3.779	6.305	–	–	–
1″	0.866	1.437	2.232	3.324	4.078	6.993	11.236	–	–
1.1/4″	1.034	1.680	2.587	3.837	4.677	7.949	12.821	18.116	–
1.3/8″	1.103	1.801	2.789	4.065	5.040	8.757	13.369	18.939	–
1.1/2″	1.180	1.939	3.025	4.322	5.274	9.009	13.928	19.841	25.773
1.5/8″	–	–	3.163	4.496	5.669	9.452	14.663	20.833	27.174
1.3/4″	–	–	3.316	4.686	5.945	10.183	15.480	21.834	28.090
1.7/8″	–	–	3.494	4.941	6.305	10.417	16.234	22.727	29.240
2″	–	–	3.693	5.225	6.711	10.753	16.779	23.474	30.675
2.1/8″	–	–	–	–	6.935	11.186	17.182	24.390	31.847
2.1/4″	–	–	–	–	7.564	11.962	17.921	25.641	32.895
2.3/8″	–	–	–	–	7.752	12.315	18.587	26.738	34.247
2.1/2″	–	–	–	–	7.862	12.788	19.305	27.473	34.965
2.5/8″	–	–	–	–	8.197	13.405	19.920	28.249	35.971
2.3/4″	–	–	–	–	8.361	13.661	20.576	29.070	37.313
2.7/8″	–	–	–	–	8.772	14.368	21.186	30.303	38.462
3″	–	–	–	–	9.025	14.663	21.930	31.646	39.683
3.1/8″	–	–	–	–	–	–	22.831	32.468	40.984
3.1/4″	–	–	–	–	–	–	23.585	33.333	42.373
3.3/8″	–	–	–	–	–	–	24.272	34.483	43.478
3.1/2″	–	–	–	–	–	–	24.876	35.211	44.643
3.3/4″	–	–	–	–	–	–	–	37.037	47.170
4″	–	–	–	–	–	–	–	38.760	50.000

Square Head Set Screws (UNC) — Estimated Weight per 100 Pieces (kg)

Square head set screws carry an external square head that takes a spanner, giving far more driving torque than an internal hex — the traditional choice for tool-post clamping, machinery mounts and agricultural equipment. The chart below covers inch-series UNC (Unified National Coarse) threads in diameters 1/4″ through 1/2″ and lengths from 1/2″ to 2.1/2″, with indicative weights in kilograms per 100 pieces. A dash marks a non-standard diameter–length combination.

Length ↓ / Dia →	1/4″	5/16″	3/8″	7/16″	1/2″
1/2″	0.485	0.800	1.253	–	–
3/4″	0.602	0.986	1.529	2.451	3.086
1″	0.718	1.174	1.805	2.632	3.584
1.1/4″	0.843	1.362	2.008	3.003	4.065
1.1/2″	0.948	1.548	2.347	3.367	4.566
2″	1.179	1.923	2.907	4.115	5.556
2.1/2″	1.408	2.299	3.460	4.878	6.536

Fully Threaded Rods (DIN 975) — Estimated Weight per Metre (kg)

Fully threaded rods (studding) to DIN 975 are continuously threaded bars normally stocked in 1, 2 and 3 metre lengths, cut to size on site for hangers, anchor fixings, U-bolt fabrication and flange stud blanks. Unlike the piece-count charts above, threaded rod is sold by length, so this table lists the estimated weight per metre in kilograms for both metric coarse sizes (M2–M48) and inch UNC sizes (1/4″–2″) side by side. Multiply by the stock length, then by the number of rods, to estimate total despatch weight.

Metric Size	Weight per Metre (kg)	UNC / Inch Size	Weight per Metre (kg)
M2	0.0187	–	–
M2.5	0.030	–	–
M3	0.044	–	–
M3.5	0.060	–	–
M4	0.078	–	–
M5	0.124	–	–
M6	0.177	1/4″	0.194
M8	0.319	5/16″	0.323
M10	0.500	3/8″	0.469
–	–	7/16″	0.650
M12	0.725	1/2″	0.896
M14	0.970	9/16″	1.096
M16	1.330	5/8″	1.342
M18	1.650	–	–
M20	2.080	3/4″	2.021
M22	2.540	7/8″	2.756
M24	3.000	1″	3.638
M27	3.850	1.1/8″	4.545
M30	4.750	1.1/4″	5.718
M33	5.900	1.3/8″	6.842
M36	6.900	1.1/2″	8.281
M39	8.200	1.5/8″	9.726
M42	9.400	1.3/4″	11.231
M45	11.000	1.7/8″	13.038
M48	12.400	2″	14.741

Fully Threaded UNC (ASTM) Studs — Estimated Weight in kg per Piece

Fully threaded stud bolts to ASTM specifications (typically A193 B7 / B8 / B16 with A194 nuts) are the standard bolting for ASME B16.5 and B16.47 flange joints. The chart below lists the estimated weight of one stud in kilograms — note this is per piece, not per 100 — for UNC / 8-UN diameters 1/2″ through 2″ and stud lengths from 50 mm to 300 mm. Multiply by the bolt-hole count of your flange and add the nut weight from the nut chart above to estimate joint bolting weight.

Length ↓ / Dia →	1/2″	5/8″	3/4″	7/8″	1″	1.1/8″	1.1/4″	1.3/8″	1.1/2″	1.5/8″	1.3/4″	1.7/8″	2″
50 mm	0.044	0.069	0.100	0.136	0.178	0.225	0.296	0.356	0.422	0.493	0.570	0.681	0.771
55 mm	0.049	0.076	0.110	0.150	0.195	0.247	0.326	0.392	0.464	0.543	0.627	0.749	0.848
60 mm	0.053	0.083	0.120	0.163	0.213	0.270	0.355	0.428	0.506	0.592	0.684	0.817	0.925
65 mm	0.058	0.090	0.130	0.177	0.231	0.292	0.385	0.463	0.549	0.641	0.741	0.885	1.002
70 mm	0.062	0.097	0.140	0.190	0.249	0.315	0.415	0.499	0.591	0.690	0.798	0.953	1.079
75 mm	0.067	0.104	0.150	0.204	0.266	0.337	0.444	0.535	0.633	0.740	0.855	1.021	1.156
80 mm	0.071	0.111	0.160	0.218	0.284	0.360	0.474	0.570	0.675	0.789	0.912	1.089	1.233
85 mm	0.075	0.118	0.170	0.231	0.302	0.382	0.504	0.606	0.717	0.838	0.969	1.158	1.310
90 mm	0.080	0.125	0.180	0.245	0.320	0.404	0.533	0.641	0.760	0.888	1.026	1.226	1.387
95 mm	0.084	0.132	0.190	0.258	0.337	0.427	0.563	0.677	0.802	0.937	1.083	1.294	1.464
100 mm	0.089	0.139	0.200	0.272	0.355	0.449	0.592	0.713	0.844	0.986	1.140	1.362	1.541
110 mm	0.098	0.153	0.220	0.299	0.391	0.494	0.652	0.784	0.928	1.085	1.254	1.498	1.695
120 mm	0.107	0.166	0.240	0.326	0.426	0.539	0.711	0.855	1.013	1.184	1.388	1.634	1.850
125 mm	0.111	0.173	0.250	0.340	0.444	0.562	0.741	0.891	1.055	1.233	1.425	1.702	1.927
130 mm	0.115	0.180	0.260	0.353	0.462	0.584	0.770	0.926	1.097	1.282	1.482	1.770	2.004
140 mm	0.124	0.194	0.280	0.381	0.497	0.628	0.829	0.998	1.182	1.381	1.596	1.907	2.158
150 mm	0.133	0.208	0.300	0.408	0.533	0.674	0.889	1.069	1.266	1.480	1.710	2.043	2.312
160 mm	0.142	0.222	0.320	0.435	0.568	0.719	0.948	1.140	1.350	1.578	1.824	2.179	2.466
170 mm	0.151	0.236	0.340	0.462	0.604	0.764	1.007	1.212	1.435	1.677	1.938	2.315	2.620
175 mm	0.155	0.243	0.350	0.476	0.621	0.786	1.037	1.247	1.477	1.726	1.995	2.383	2.697
180 mm	0.160	0.250	0.360	0.489	0.639	0.809	1.066	1.283	1.519	1.776	2.052	2.451	2.774
190 mm	0.169	0.264	0.380	0.517	0.675	0.854	1.126	1.354	1.604	1.874	2.166	2.588	2.928
200 mm	0.178	0.277	0.399	0.544	0.710	0.899	1.185	1.425	1.688	1.973	2.280	2.724	3.083
210 mm	0.186	0.291	0.419	0.571	0.746	0.944	1.244	1.497	1.772	2.071	2.394	2.860	3.237
220 mm	0.195	0.305	0.439	0.596	0.781	0.989	1.303	1.568	1.857	2.170	2.508	2.996	3.391
225 mm	0.200	0.312	0.449	0.612	0.799	1.011	1.333	1.604	1.899	2.219	2.565	3.064	3.468
230 mm	0.204	0.319	0.459	0.625	0.817	1.034	1.363	1.639	1.941	2.269	2.622	3.132	3.545
240 mm	0.213	0.333	0.479	0.653	0.852	1.079	1.422	1.710	2.026	2.367	2.736	3.268	3.699
250 mm	0.222	0.347	0.499	0.680	0.888	1.124	1.481	1.782	2.110	2.466	2.850	3.405	3.853
260 mm	0.231	0.361	0.519	0.707	0.923	1.169	1.540	1.853	2.194	2.565	2.964	3.541	4.007
270 mm	0.240	0.375	0.539	0.734	0.959	1.213	1.600	1.924	2.279	2.663	3.078	3.677	4.161
275 mm	0.244	0.382	0.549	0.748	0.977	1.236	1.629	1.960	2.321	2.713	3.135	3.745	4.238
280 mm	0.249	0.388	0.559	0.761	0.994	1.258	1.659	1.995	2.363	2.762	3.192	3.813	4.316
290 mm	0.257	0.402	0.579	0.788	1.030	1.303	1.718	2.067	2.448	2.861	3.306	3.949	4.470
300 mm	0.266	0.416	0.599	0.816	1.065	1.348	1.777	2.138	2.532	2.959	3.420	4.086	4.624

Machine Screws, Cheese Head, IS 1366:2002 — Estimated Weight per 100 Pieces (kg)

Cheese head machine screws to IS 1366:2002 have a tall cylindrical slotted head with flat top and sides, used on electrical gear, instruments, panels and light machinery. Unlike the bolt matrices above, this chart runs diameter down the side and length (mm) across the top: indicative weights in kilograms per 100 screws for M1.6 through M10 in lengths from 2 mm to 100 mm. A dash marks a non-standard diameter–length combination.

Dia ↓ / Length (mm) →	2	3	4	5	6	8	10	12	14	16	20	25	30	35	40	45	50	55	60	65	70	80	90	100
M1.6	0.007	0.008	0.009	0.010	0.011	0.014	0.016	0.018	0.020	0.023	–	–	–	–	–	–	–	–	–	–	–	–	–	–
M2	–	0.016	0.017	0.019	0.021	0.025	0.029	0.032	0.036	0.040	0.047	–	–	–	–	–	–	–	–	–	–	–	–	–
M2.5	–	0.027	0.030	0.033	0.036	0.042	0.048	0.054	0.060	0.066	0.078	–	–	–	–	–	–	–	–	–	–	–	–	–
M3	–	–	–	–	0.060	0.069	0.078	0.087	0.096	0.104	0.122	0.144	0.166	0.188	0.210	0.232	0.254	0.276	0.298	–	–	–	–	–
M4	–	–	–	–	0.111	0.126	0.141	0.157	0.172	0.188	0.219	0.258	0.296	0.349	0.380	0.417	0.457	0.471	0.490	–	0.566	0.642	0.718	–
M5	–	–	–	–	0.206	0.220	0.255	0.280	0.305	0.330	0.378	0.440	0.502	0.562	0.625	0.688	0.750	0.810	0.875	–	1.000	1.130	1.255	1.380
M6	–	–	–	–	–	0.356	0.392	0.427	0.462	0.498	0.569	0.656	0.745	0.825	0.920	1.000	1.090	1.170	1.260	–	1.430	1.600	1.770	1.940
M8	–	–	–	–	–	–	0.785	0.849	0.913	0.977	1.100	1.260	1.420	1.580	1.740	1.890	2.060	2.210	2.390	–	2.700	3.010	3.330	3.650
M10	–	–	–	–	–	–	–	1.460	1.560	1.660	1.860	2.110	2.360	2.610	2.860	3.110	3.360	3.610	3.860	4.130	4.400	4.860	5.350	5.850

Machine Screws, CSK Head, IS 1365:2005 — Estimated Weight per 100 Pieces (kg)

Countersunk (CSK) head machine screws to IS 1365:2005 have a flat 90° slotted head that finishes flush with the work surface — the companion to the cheese head chart above wherever a snag-free face is needed. Like that chart, this matrix runs diameter down the side and length (mm) across the top: indicative weights in kilograms per 100 screws for M1.6 through M20 in lengths from 2 mm to 100 mm. A dash marks a non-standard diameter–length combination; the flush head also makes each size slightly lighter than its cheese head equivalent.

Dia ↓ / Length (mm) →	2	3	4	5	6	8	10	12	14	16	20	25	30	35	40	45	50	55	60	70	80	90	100
M1.6	0.004	0.005	0.006	0.008	0.009	0.011	0.013	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–
M2	–	0.010	0.011	0.013	0.015	0.019	0.023	0.026	0.030	0.034	0.042	–	–	–	–	–	–	–	–	–	–	–	–
M2.5	–	0.017	0.020	0.023	0.026	0.032	0.038	0.044	0.050	0.056	0.068	0.083	0.098	–	–	–	–	–	–	–	–	–	–
M3	–	–	–	–	0.037	0.047	0.056	0.065	0.078	0.089	0.100	0.122	0.145	0.166	0.188	0.210	0.232	0.254	0.276	–	–	–	–
M4	–	–	–	–	–	0.094	0.110	0.125	0.141	0.150	0.187	0.226	0.264	0.301	0.338	0.376	0.414	0.452	0.490	0.566	0.642	0.718	–
M5	–	–	–	–	–	–	0.183	0.208	0.246	0.260	0.307	0.370	0.431	0.493	0.555	0.617	0.680	0.743	0.806	0.932	1.058	1.185	1.310
M6	–	–	–	–	–	–	0.274	0.308	0.370	0.405	0.450	0.538	0.626	0.715	0.801	0.886	0.970	1.075	1.152	1.330	1.504	1.680	1.856
M8	–	–	–	–	–	–	–	0.611	0.686	0.790	0.865	1.020	1.180	1.340	1.500	1.650	1.810	1.970	2.135	2.400	2.740	3.060	3.380
M10	–	–	–	–	–	–	–	–	–	1.350	1.450	1.700	1.950	2.200	2.450	2.700	2.950	3.200	3.450	3.800	4.390	4.900	5.410
M12	–	–	–	–	–	–	–	–	–	–	2.180	2.550	2.920	3.280	3.650	4.010	4.380	4.750	5.110	5.840	6.570	7.820	9.100
M16	–	–	–	–	–	–	–	–	–	–	–	4.540	5.210	5.870	6.540	7.200	7.870	8.530	9.190	10.500	11.800	13.100	14.500
M20	–	–	–	–	–	–	–	–	–	–	–	–	8.160	9.260	10.300	11.400	12.500	13.600	14.700	16.900	19.100	–	–

Machine Screws, CSK Head, BS 450 — Estimated Weight per 100 Pieces (kg)

For imperial work, countersunk machine screws to the British Standard BS 450 (BSW thread) complement the metric IS 1365 chart above. Diameters run from 1/8″ to 3/4″ and lengths from 1/4″ to 6″, with indicative weights in kilograms per 100 screws. A dash marks a diameter–length combination not listed as a standard size; the 5/32″ and 3/4″ diameters are made against specific enquiry only.

Dia ↓ / Length →	1/4″	3/8″	1/2″	5/8″	3/4″	1″	1.1/4″	1.1/2″	1.3/4″	2″	2.1/2″	3″	3.1/2″	4″	5″	6″
1/8″	–	–	–	–	–	–	–	0.173	–	–	–	–	–	–	–	–
5/32″	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–
3/16″	–	–	0.150	–	0.229	0.280	0.344	0.400	0.464	0.500	0.624	0.750	0.875	1.000	1.250	1.500
1/4″	–	–	0.288	–	0.438	0.563	0.725	0.800	–	1.025	1.300	1.400	1.700	–	–	–
5/16″	–	–	0.600	–	0.700	0.925	1.058	1.250	–	1.725	2.025	2.325	2.650	3.072	–	–
3/8″	–	–	–	–	1.100	1.400	1.700	1.960	–	2.400	3.000	3.400	3.950	4.600	–	–
1/2″	–	–	–	–	–	2.575	3.050	3.600	–	4.600	5.600	6.400	–	8.200	10.661	11.310
5/8″	–	–	–	–	–	–	–	–	–	–	–	–	–	14.500	–	–
3/4″	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–

Pan Phillips (Cross Recessed) Head Machine Screws to IS 7483:2005 / ISO 7045:1994 (DIN 7985) — Estimated Weight per 100 Pieces (kg)

Pan head machine screws with a Phillips (Type H) cross recess are the workhorse of assembly-line and sheet-metal fastening — the recessed drive self-centres the bit for power-tool driving. They are standardised in IS 7483:2005, ISO 7045:1994 and the equivalent DIN 7985. The matrix runs diameter down the side and length (mm) across the top: indicative weights in kilograms per 100 screws for M1.6 through M10 in lengths from 3 mm to 60 mm. A dash marks a non-standard diameter–length combination.

Dia ↓ / Length (mm) →	3	4	5	6	8	10	12	14	16	20	25	30	35	40	45	50	55	60
M1.6	0.0099	0.0111	0.0123	0.0134	0.0157	0.0180	0.0203	0.0226	0.0245	–	–	–	–	–	–	–	–	–
M2	0.0178	0.0196	0.0215	0.0233	0.0270	0.0307	0.0344	0.0381	0.0418	0.0492	–	–	–	–	–	–	–	–
M2.5	0.0336	0.0366	0.0396	0.0426	0.0486	0.0546	0.0606	0.0666	0.0726	0.0846	0.0996	–	–	–	–	–	–	–
M3	–	0.0544	0.0588	0.0632	0.0720	0.0808	0.0896	0.0984	0.1070	0.1250	0.1470	0.169	–	–	–	–	–	–
M3.5	–	–	0.0891	0.0951	0.1070	0.1190	0.1310	0.1430	0.1550	0.1790	0.2090	0.239	0.268	–	–	–	–	–
M4	–	–	0.1300	0.1380	0.1530	0.1690	0.1840	0.2000	0.2150	0.2460	0.2850	0.323	0.362	0.401	–	–	–	–
M5	–	–	–	0.2320	0.2570	0.2810	0.3060	0.3310	0.3560	0.4050	0.4670	0.529	0.591	0.652	0.714	–	–	–
M6	–	–	–	–	0.4370	0.4720	0.5070	0.5420	0.5780	0.6480	0.7360	0.824	0.912	1.000	1.090	1.18	1.26	1.35
M8	–	–	–	–	–	0.9960	1.0600	1.1200	1.1900	1.3200	1.4800	1.640	1.800	1.960	2.120	2.28	2.44	2.60
M10	–	–	–	–	–	–	1.9800	2.0800	2.1800	2.3800	2.6300	2.880	3.130	3.390	3.640	3.89	4.14	4.39

CSK Phillips (Cross Recessed) Head Machine Screws to IS 7485 (Part 1):2005 / ISO 7046-1:1994 (DIN 965A) — Estimated Weight per 100 Pieces (kg)

The countersunk version of the pan Phillips screw above: a flat 90° head with a Phillips (Type H) cross recess that drives flush into the work surface, standardised in IS 7485 (Part 1):2005, ISO 7046-1:1994 and the equivalent DIN 965A. The matrix runs diameter down the side and length (mm) across the top: indicative weights in kilograms per 100 screws for M1.6 through M10 in lengths from 3 mm to 60 mm. A dash marks a non-standard diameter–length combination; the flush head makes each size lighter than its pan head counterpart.

Dia ↓ / Length (mm) →	3	4	5	6	8	10	12	14	16	20	25	30	35	40	45	50	55	60
M1.6	0.0058	0.0069	0.0081	0.0093	0.0116	0.0139	0.0162	0.0185	0.0208	–	–	–	–	–	–	–	–	–
M2	0.0101	0.0119	0.0137	0.0152	0.0193	0.0231	0.0268	0.0306	0.0343	0.0417	–	–	–	–	–	–	–	–
M2.5	0.0176	0.0206	0.0236	0.0266	0.0326	0.0386	0.0446	0.0507	0.0567	0.0687	0.0838	–	–	–	–	–	–	–
M3	–	0.0291	0.0335	0.0379	0.0467	0.0555	0.0643	0.0731	0.0820	0.0996	0.1220	0.144	–	–	–	–	–	–
M3.5	–	–	0.0573	0.0633	0.0753	0.0873	0.0993	0.1110	0.1230	0.1470	0.1770	0.207	0.237	–	–	–	–	–
M4	–	–	0.0825	0.0903	0.1060	0.1220	0.1370	0.1530	0.1680	0.2000	0.2390	0.278	0.317	0.356	–	–	–	–
M5	–	–	–	0.1240	0.1480	0.1720	0.1960	0.2200	0.2440	0.2920	0.3520	0.412	0.472	0.532	0.592	0.652	–	–
M6	–	–	–	–	0.2380	0.2730	0.3080	0.3430	0.3780	0.4480	0.5360	0.623	0.711	0.798	0.886	0.973	1.06	1.15
M8	–	–	–	–	–	0.5680	0.6320	0.6960	0.7600	0.8880	1.0500	1.210	1.370	1.530	1.690	1.850	2.01	2.17
M10	–	–	–	–	–	–	0.9540	1.0600	1.1600	1.3600	1.6100	1.870	2.12	2.370	2.620	2.880	3.13	3.38

Split Pins (Cotter Pins) to DIN 94 / IS 549:2005 — Estimated Weight per 1000 Pieces (kg)

Split pins (cotter pins) to DIN 94 and IS 549:2005 are bent half-round wire pins pushed through a drilled bolt or clevis and spread open to lock castle and slotted nuts against rotation. Being light items, this chart is quoted per 1000 pieces — not per 100 like the screw charts above. Nominal diameters M1 through M13 refer to the pin hole size; lengths run 6 mm to 140 mm, measured from under the head to the tip of the shorter prong. A dash marks a non-standard diameter–length combination.

Length (mm) ↓ / Dia →	M1	M1.6	M2	M2.5	M3.2	M4	M5	M6.3	M8	M10	M13
6 mm	0.03	–	–	–	–	–	–	–	–	–	–
8 mm	0.04	0.10	–	–	–	–	–	–	–	–	–
10 mm	0.05	0.12	0.25	–	–	–	–	–	–	–	–
12 mm	0.06	0.14	0.28	0.51	–	–	–	–	–	–	–
14 mm	0.07	0.16	0.31	0.57	–	–	–	–	–	–	–
16 mm	0.08	0.18	0.34	0.63	–	–	–	–	–	–	–
18 mm	0.10	0.20	0.37	0.69	1.00	–	–	–	–	–	–
20 mm	–	0.22	0.40	0.75	1.09	2.16	3.49	–	–	–	–
22 mm	–	0.24	0.43	0.81	1.18	2.28	3.74	–	–	–	–
25 mm	–	0.27	0.47	0.90	1.31	2.52	4.00	–	–	–	–
28 mm	–	0.30	0.51	0.98	1.45	2.76	4.49	8.04	–	–	–
32 mm	–	0.34	0.56	1.10	1.64	3.07	5.00	8.90	–	–	–
36 mm	–	–	0.61	1.22	1.80	3.39	5.49	9.76	15.9	–	–
40 mm	–	–	0.66	1.34	2.00	3.71	6.00	10.60	17.2	–	–
45 mm	–	–	–	1.49	2.17	4.11	6.61	11.70	18.9	–	–
50 mm	–	–	–	1.64	2.43	4.51	7.24	12.80	20.6	–	–
56 mm	–	–	–	–	2.70	5.00	8.00	14.00	22.6	38.0	69.5
63 mm	–	–	–	–	3.02	5.55	8.67	15.60	25.0	41.8	76.0
71 mm	–	–	–	–	3.38	6.20	9.86	17.30	27.7	46.2	83.4
80 mm	–	–	–	–	3.78	6.91	11.00	19.20	30.7	51.2	91.8
90 mm	–	–	–	–	–	7.71	12.20	21.30	34.1	56.7	101.0
100 mm	–	–	–	–	–	8.51	13.50	23.50	37.5	62.2	111.0
112 mm	–	–	–	–	–	9.46	15.00	26.10	41.5	66.0	122.0
125 mm	–	–	–	–	–	10.50	16.60	28.90	45.9	75.9	134.0
140 mm	–	–	–	–	–	–	–	32.10	51.0	84.2	148.0

Circlips — External (DIN 471), Internal (DIN 472) & E-Clips (DIN 6799) — Estimated Weight per 1000 Pieces (kg)

Circlips (retaining rings / snap rings) of spring steel locate bearings, gears and pins axially in a groove. External circlips to DIN 471 clip onto a shaft, internal circlips to DIN 472 spring into a housing bore, and E-clips to DIN 6799 slide sideways into a shaft groove where there is no room to feed a ring over the end. Like the split pin chart, weights here are quoted per 1000 pieces. The first diameter column covers shaft / bore sizes 3 mm to 300 mm for DIN 471 / 472; the separate right-hand pair lists E-clip shaft sizes 0.8 mm to 30 mm. A dash marks a size not produced in that style.

Shaft / Bore Dia (mm)	External Circlip DIN 471	Internal Circlip DIN 472	Shaft Dia (mm)	E-Clip DIN 6799
3	0.017	–	0.8	0.003
4	0.022	–	1.2	0.009
5	0.066	–	1.5	0.021
6	0.084	–	1.9	0.040
7	0.121	–	2.3	0.069
8	0.158	0.14	3.2	0.088
9	0.30	0.15	4	0.158
10	0.34	0.18	5	0.236
11	0.41	0.31	6	0.255
12	0.50	0.37	7	0.474
13	0.53	0.42	8	0.66
14	0.64	0.52	9	1.09
15	0.67	0.56	10	1.25
16	0.70	0.6	12	1.63
17	0.82	0.65	15	3.37
18	1.11	0.74	19	6.42
19	1.22	0.83	24	8.55
20	1.30	0.9	30	13.5
21	1.42	1	–	–
22	1.50	1.1	–	–
24	1.77	1.42	–	–
25	1.90	1.5	–	–
26	1.96	1.6	–	–
28	2.92	1.8	–	–
29	3.20	2.06	–	–
30	3.31	2.1	–	–
32	3.54	2.21	–	–
34	3.80	3.2	–	–
35	4.00	3.54	–	–
36	5.00	3.7	–	–
37	–	3.74	–	–
38	5.62	3.9	–	–
40	6.03	4.7	–	–
42	6.50	5.4	–	–
45	7.50	6	–	–
47	–	6.1	–	–
48	7.90	6.7	–	–
50	10.2	7.3	–	–
52	11.1	8.2	–	–
55	11.4	8.3	–	–
56	11.8	8.7	–	–
58	12.6	10.5	–	–
60	12.9	11.1	–	–
62	14.3	11.2	–	–
63	15.9	11.7	–	–
65	18.20	14.3	–	–
68	21.80	16	–	–
70	22.00	16.5	–	–
72	22.50	18.1	–	–
75	24.60	18.8	–	–
78	26.20	20.4	–	–
80	27.30	22	–	–
82	31.20	24	–	–
85	36.40	25.3	–	–
88	41.20	28	–	–
90	44.50	31	–	–
92	–	32	–	–
95	49.00	35	–	–
98	–	37	–	–
100	53.70	38	–	–
102	–	55	–	–
105	80	56	–	–
108	–	60	–	–
110	82	64.5	–	–
112	–	72	–	–
115	84	74.5	–	–
120	86	77	–	–
125	90	79	–	–
130	100	82	–	–
135	104	84	–	–
140	110	87.5	–	–
145	115	93	–	–
150	120	105	–	–
155	135	107	–	–
160	150	110	–	–
165	160	125	–	–
170	170	140	–	–
175	180	150	–	–
180	190	165	–	–
185	200	170	–	–
190	210	175	–	–
195	220	183	–	–
200	230	195	–	–
210	248	270	–	–
220	265	315	–	–
230	290	330	–	–
240	310	345	–	–
250	335	360	–	–
260	355	375	–	–
270	375	388	–	–
280	398	400	–	–
290	418	415	–	–
300	440	435	–	–

Dowel Pins (Solid) DIN 6325 — Estimated Weight per 1000 Pieces (kg)

Solid dowel pins to DIN 6325 are hardened, precision-ground cylindrical pins (typically m6 tolerance) pressed into reamed holes to locate mating parts — jigs, fixtures, dies and machine assemblies — with repeatable accuracy. Like the split pin and circlip charts, weights are quoted per 1000 pieces: nominal diameters 0.8 mm to 20 mm and lengths from 2 mm to 120 mm. A dash marks a non-standard diameter–length combination.

Length (mm) ↓ / Dia →	M0.8	M1	M1.5	M2	M2.5	M3	M4	M5	M6	M8	M10	M12	M14	M16	M20
2 mm	0.008	–	–	–	–	–	–	–	–	–	–	–	–	–	–
3 mm	0.012	–	–	–	–	–	–	–	–	–	–	–	–	–	–
4 mm	0.016	0.025	0.055	–	–	–	–	–	–	–	–	–	–	–	–
5 mm	0.020	0.032	0.069	–	–	–	–	–	–	–	–	–	–	–	–
6 mm	0.024	0.038	0.083	0.148	0.230	–	–	–	–	–	–	–	–	–	–
8 mm	0.032	0.048	0.111	0.197	0.307	0.443	–	–	–	–	–	–	–	–	–
10 mm	–	0.062	0.139	0.246	0.384	0.554	0.985	–	–	–	–	–	–	–	–
12 mm	–	0.074	0.166	0.296	0.462	0.665	1.18	1.85	–	–	–	–	–	–	–
14 mm	–	–	0.194	0.345	0.538	0.775	1.38	2.16	3.10	–	–	–	–	–	–
16 mm	–	–	0.222	0.395	0.615	0.886	1.58	2.46	3.55	–	–	–	–	–	–
18 mm	–	–	–	0.444	0.692	0.996	1.77	2.77	3.99	7.10	–	–	–	–	–
20 mm	–	–	–	0.493	0.769	1.11	1.97	3.08	4.44	7.89	–	–	–	–	–
24 mm	–	–	–	–	0.924	1.33	2.37	3.7	5.32	9.46	14.8	–	–	–	–
28 mm	–	–	–	–	–	1.55	2.76	4.32	6.21	11.0	17.2	24.9	–	–	–
32 mm	–	–	–	–	–	1.77	3.15	4.93	7.10	12.6	19.7	28.4	–	–	–
36 mm	–	–	–	–	–	–	3.55	5.54	7.98	14.2	22.2	31.7	43.5	–	–
40 mm	–	–	–	–	–	–	3.94	6.15	8.86	15.8	24.6	35.5	48.3	63.1	–
45 mm	–	–	–	–	–	–	–	6.93	9.96	17.7	27.7	40.0	54.4	71.0	–
50 mm	–	–	–	–	–	–	–	7.7	11.1	19.7	30.8	44.4	60.4	78.9	123
55 mm	–	–	–	–	–	–	–	–	12.2	21.6	33.9	48.8	66.4	86.8	136
60 mm	–	–	–	–	–	–	–	–	13.3	23.6	37.0	53.3	72.5	94.6	148
70 mm	–	–	–	–	–	–	–	–	–	27.6	43.2	62.2	84.6	110	173
80 mm	–	–	–	–	–	–	–	–	–	31.5	49.4	71.0	96.6	126	197
90 mm	–	–	–	–	–	–	–	–	–	–	55.5	79.9	109	142	222
100 mm	–	–	–	–	–	–	–	–	–	–	61.6	88.8	121	158	246
120 mm	–	–	–	–	–	–	–	–	–	–	–	–	145	189	296

Spring Dowel Pins (Roll Pins) DIN 1481 — Estimated Weight per 1000 Pieces (kg)

Spring dowel pins (slotted spring pins / roll pins) to DIN 1481 / ISO 8752 are rolled from spring steel strip with a full-length slot, so they compress on insertion and grip a plain drilled hole by radial spring force — no reaming needed, unlike the solid DIN 6325 dowels above. Being hollow they are also lighter size for size. Weights are quoted per 1000 pieces: nominal diameters 1 mm to 20 mm and lengths from 4 mm to 180 mm. A dash marks a non-standard diameter–length combination.

Length (mm) ↓ / Dia →	M1	M1.5	M2	M2.5	M3	M3.5	M4	M4.5	M5	M6	M8	M10	M12	M14	M16	M20
4 mm	0.015	0.034	0.061	0.095	0.136	0.197	0.239	–	–	–	–	–	–	–	–	–
5 mm	0.019	0.043	0.077	0.118	0.17	0.246	0.299	0.397	0.471	–	–	–	–	–	–	–
6 mm	0.023	0.051	0.092	0.142	0.204	0.296	0.358	0.476	0.566	–	–	–	–	–	–	–
8 mm	0.031	0.068	0.122	0.189	0.272	0.394	0.478	0.635	0.754	–	–	–	–	–	–	–
10 mm	0.038	0.085	0.153	0.236	0.34	0.493	0.597	0.793	0.942	1.38	2.24	3.69	5.55	7.8	9.19	15.3
12 mm	0.045	0.103	0.184	0.283	0.407	0.591	0.716	0.952	1.13	1.66	2.66	4.43	6.66	9.35	11	18.4
14 mm	0.052	0.12	0.214	0.33	0.475	0.689	0.836	1.11	1.32	1.94	3.13	5.17	7.78	10.9	12.9	21.4
16 mm	0.059	0.137	0.244	0.377	0.543	0.788	0.955	1.27	1.51	2.21	3.58	5.9	8.89	12.5	14.7	24.5
18 mm	0.067	0.154	0.275	0.424	0.611	0.886	1.07	1.43	1.70	2.49	4.03	6.64	10	14	16.5	27.5
20 mm	0.076	0.171	0.305	0.471	0.679	0.985	1.19	1.59	1.88	2.77	4.48	7.38	11.1	15.6	18.4	30.6
22 mm	–	–	0.336	0.519	0.746	1.08	1.31	1.75	2.07	3.04	4.92	8.12	12.2	17.1	20.2	33.6
24 mm	–	–	0.367	0.565	0.814	1.18	1.43	1.9	2.26	3.32	5.37	8.86	13.3	18.7	22	36.7
26 mm	–	–	0.397	0.613	0.882	1.28	1.55	2.06	2.45	3.6	5.82	9.59	14.4	20.3	23.9	39.8
28 mm	–	–	0.427	0.66	0.95	1.38	1.67	2.22	2.64	3.87	6.26	10.3	15.6	21.8	25.7	42.8
30 mm	–	–	0.458	0.707	1.02	1.48	1.79	2.38	2.83	4.15	6.71	11.1	16.7	23.4	27.6	45.9
32 mm	–	–	–	–	1.09	1.58	1.91	2.54	3.02	4.43	7.16	11.8	17.8	24.9	29.4	48.9
36 mm	–	–	–	–	1.22	1.77	2.18	2.86	3.39	4.98	8.06	13.3	20	28.1	33.1	55.1
40 mm	–	–	–	–	1.36	1.97	2.39	3.17	3.77	5.54	8.95	14.8	22.2	31.2	36.7	61.2
45 mm	–	–	–	–	–	–	2.68	3.57	4.24	6.23	10.1	16.6	25	35.1	41.3	68.8
50 mm	–	–	–	–	–	–	2.98	3.96	4.71	6.92	11.2	18.4	27.8	39	45.9	76.5
55 mm	–	–	–	–	–	–	–	–	5.18	7.61	12.3	20.3	30.5	42.9	50.5	84.1
60 mm	–	–	–	–	–	–	–	–	5.65	8.3	13.4	22.1	33.3	46.8	55.1	91.8
65 mm	–	–	–	–	–	–	–	–	6.12	8.99	14.5	24	36.1	50.1	59.7	99.4
70 mm	–	–	–	–	–	–	–	–	6.59	9.69	15.7	25.8	38.9	54.6	64.3	107
75 mm	–	–	–	–	–	–	–	–	7.06	10.4	16.8	27.7	41.7	58.5	68.9	115
80 mm	–	–	–	–	–	–	–	–	7.54	11.1	18.0	29.5	44.4	62.4	73.5	122
85 mm	–	–	–	–	–	–	–	–	–	11.8	19.0	31.4	47.2	66.3	78.1	130
90 mm	–	–	–	–	–	–	–	–	–	12.5	20.1	33.2	50	70.2	82.7	138
95 mm	–	–	–	–	–	–	–	–	–	13.1	21.3	35	52.8	74.1	87.3	145
100 mm	–	–	–	–	–	–	–	–	–	13.8	22.4	36.9	55.5	77.9	91.9	153
120 mm	–	–	–	–	–	–	–	–	–	–	26.8	44.3	66.6	93.5	110	184
140 mm	–	–	–	–	–	–	–	–	–	–	–	51.7	77.8	109	129	214
160 mm	–	–	–	–	–	–	–	–	–	–	–	59	88.9	125	147	245
180 mm	–	–	–	–	–	–	–	–	–	–	–	–	100	140	165	275

Eye Bolts (Lifting Hooks) DIN 580 & Eye Nuts DIN 582 — Estimated Weight per Piece (kg)

Forged lifting eye bolts to DIN 580 and their mating eye nuts to DIN 582 are the standard screwed lifting points for motors, gearboxes, dies, valves and machine housings — the ring takes a hook or shackle directly. Note these are heavy forged items, so this chart is quoted per piece (not per 100 or per 1000) for thread sizes M8 through M100. Always check the rated working load limit for the lifting angle before use; weight alone is no indication of capacity.

Thread Size	Lifting Eye Bolt DIN 580 — Weight per Piece (kg)	Lifting Eye Nut DIN 582 — Weight per Piece (kg)
M8	0.06	0.05
M10	0.11	0.09
M12	0.18	0.16
M16	0.28	0.24
M20	0.45	0.36
M24	0.74	0.72
M30	1.66	1.32
M36	2.65	2.08
M42	4.03	3.11
M48	6.38	5.02
M56	8.80	6.69
M64	12.4	9.30
M72	23.3	18.5
M80	34.2	27.3
M100	49.1	36.4

Hex Screw Plugs DIN 910 — Estimated Weight per 1000 Pieces (kg)

Hexagon head screw plugs to DIN 910 are solid threaded plugs with a fine-pitch metric thread and a sealing collar, used to close oil-fill, drain and inspection ports on gearboxes, pumps, compressors and hydraulic blocks — usually with a sealing ring under the collar. Weights below are quoted per 1000 pieces. Where a size is produced in two pitches (M20, M27, M30), both thread designations are shown against the same weight; a dash means that pitch variant is not listed.

Thread Size (Fine Pitch)	Alternate Thread Size	Weight per 1000 Pieces (kg)
M10×1	–	12.0
M12×1.5	–	20.3
M14×1.5	–	25.0
M16×1.5	–	35.2
M18×1.5	–	48.6
M20×1.5	M20×2	64.5
M22×1.5	–	73.4
M24×1.5	–	93.5
M26×1.5	–	120
–	M27×2	127
M30×1.5	M30×2	148

Self-Tapping Screws, Pan Phillips Head, DIN 7981 / ISO 7049 — Estimated Weight per 1000 Pieces (kg)

Pan head self-tapping screws with a Phillips cross recess to DIN 7981 / ISO 7049 cut their own thread in sheet metal, ducting, enclosures and plastic mouldings — only a pilot hole is needed, no nut or tapped thread. The hardened case-carburised tapping thread is coarser than a machine-screw thread, which is why the diameter series (2.2, 2.9, 3.5, 3.9, 4.2, 4.8, 5.5, 6.3) differs from the standard metric range. Weights below are quoted per 1000 pieces for lengths from 4.5 mm to 38 mm; a dash marks a non-standard diameter–length combination.

Length (mm) ↓ / Dia →	M2.2	M2.9	M3.5	M3.9	M4.2	M4.8	M5.5	M6.3
4.5 mm	0.16	–	–	–	–	–	–	–
6.5 mm	0.2	0.4	–	–	–	–	–	–
9.5 mm	0.26	0.51	0.79	1.05	1.22	1.85	–	–
13 mm	0.33	0.63	0.97	1.27	1.46	2.2	3.2	3.9
16 mm	0.39	0.74	1.12	1.46	1.67	2.5	3.6	4.44
19 mm	–	0.85	1.27	1.65	1.88	2.8	4	4.98
22 mm	–	–	1.42	1.84	2.1	3.1	4.38	5.52
25 mm	–	–	1.57	2.03	2.3	3.4	4.76	6.06
32 mm	–	–	–	–	2.8	4.1	5.67	7.32
38 mm	–	–	–	–	–	4.7	6.45	8.4

Self-Tapping Screws, CSK Phillips Head, DIN 7982 / ISO 7050 — Estimated Weight per 1000 Pieces (kg)

The countersunk companion to the DIN 7981 pan head tapping screw above: a flat 90° Phillips-recessed head to DIN 7982 / ISO 7050 that finishes flush in dimpled or countersunk sheet metal, panels and trim. The diameter series and length range are the same as the pan head chart, and weights are again per 1000 pieces — slightly lighter size for size because of the flush head. A dash marks a non-standard diameter–length combination.

Length (mm) ↓ / Dia →	M2.2	M2.9	M3.5	M3.9	M4.2	M4.8	M5.5	M6.3
4.5 mm	0.1	–	–	–	–	–	–	–
6.5 mm	0.14	0.28	–	–	–	–	–	–
9.5 mm	0.2	0.35	0.54	0.66	–	–	–	–
13 mm	0.27	0.476	0.718	0.88	1.02	1.45	–	–
16 mm	0.33	0.584	0.871	1.07	1.23	1.75	2.49	3.07
19 mm	–	0.692	1.02	1.26	1.44	2.05	2.87	3.61
22 mm	–	–	1.17	1.45	1.65	2.35	3.26	4.15
25 mm	–	–	1.32	1.64	1.86	2.65	3.65	4.69
32 mm	–	–	–	–	2.35	3.35	4.56	5.95
38 mm	–	–	–	–	–	–	5.43	7.03

Nut Weight Chart — Estimated Weight per 100 Nuts (kg)

Estimated weight of 100 mild-steel nuts across the common nut patterns — standard hex (IS 1363, old & new spec), high (height = diameter), hex lock, high-strength (IS 6623), castle (IS 2232), nyloc (DIN 985), dome / cap (DIN 1587), and the imperial hex / lock / square (BSW & BSF) and heavy-hex (ASTM A194 UNC) nuts. Values are in kilograms per 100 pieces and are approximate; a dash means that pattern is not standard in that size.

Metric Size	Hex Nut IS 1363:1967 (old)	Hex Nut IS 1363:1992 (new)	High Nut (height = dia)	Hex Lock Nut IS 1364:1984	High-Strength Nut IS 6623	Castle Nut IS 2232:1967	Nyloc Nut DIN 985	Dome / Cap Nut DIN 1587	BSW / Inch Size	Hex Nut BSW / BSF	Hex Lock Nut BSW / BSF	Square Nut BSW	Heavy Hex Nut ASTM A194 UNC
M2	0.011	–	–	–	–	–	–	–	1/8"	0.041	–	–	–
M3	0.033	–	–	–	–	–	0.050	–	5/32"	0.053	–	–	–
M4	0.067	–	–	–	–	0.112	0.100	–	3/16"	0.133	–	–	–
M5	0.111	–	–	0.080	–	0.230	0.140	–	1/4"	0.323	0.190	0.340	–
M6	0.232	–	–	0.120	–	0.316	0.240	0.466	5/16"	0.510	0.340	0.654	0.758
M7	0.294	–	–	–	–	0.396	0.300	–	3/8"	0.817	0.510	0.966	1.370
M8	0.482	–	–	0.300	–	0.735	0.510	1.10	7/16"	1.389	0.930	1.683	2.000
M10	1.020	0.909	1.282	0.670	–	1.580	1.060	2.01	1/2"	2.222	1.430	2.677	2.959
M12	1.590	1.389	1.942	1.090	–	2.000	1.720	2.83	5/8"	4.348	2.700	5.040	5.263
M14	2.400	–	3.049	1.680	–	2.700	2.600	5.72	3/4"	7.184	4.800	8.818	8.621
M16	3.081	3.333	3.906	1.800	6.040	3.890	3.400	5.43	7/8"	8.621	5.600	10.917	12.658
M18	4.448	–	5.814	2.690	–	5.750	4.500	9.50	1"	12.987	8.500	15.432	17.986
M20	6.031	6.667	7.519	3.300	11.530	7.520	6.500	10.40	1.1/8"	18.182	11.800	23.364	26.316
M22	7.143	8.929	9.091	3.890	14.280	9.300	7.500	12.90	1.1/4"	26.596	17.200	33.333	34.247
M24	10.309	12.500	12.821	5.100	19.770	13.100	10.000	21.60	1.3/8"	37.879	23.000	–	44.248
M27	15.432	–	18.657	8.150	28.230	19.200	16.200	–	1.1/2"	45.455	28.000	–	60.241
M30	21.645	–	26.596	10.400	36.500	26.400	21.200	–	1.5/8"	71.429	–	–	73.529
M33	27.174	–	34.483	14.300	–	33.330	31.700	–	1.3/4"	71.429	46.000	–	90.909
M36	37.037	–	43.860	17.600	28.180	44.700	41.500	–	2"	81.967	54.000	–	135.135
M39	47.619	–	57.471	24.000	–	58.400	49.900	–	2.1/4"	111.111	–	–	185.185
M42	57.471	–	73.529	27.500	–	71.000	62.800	–	2.1/2"	172.414	–	–	238.095
M45	72.464	–	92.593	37.000	–	86.000	77.100	–	2.3/4"	263.158	–	–	333.333
M48	92.593	–	113.636	42.800	–	106.000	99.800	–	3"	333.333	–	–	454.545
M52	108.696	–	138.889	52.000	–	130.000	–	–	0 BA	0.270	–	–	–
M56	131.579	–	166.667	–	–	–	–	–	2 BA	0.126	–	–	–
M60	161.290	–	192.308	–	–	–	–	–	–	–	–	–	–
M64	185.185	–	227.273	–	–	–	–	–	–	–	–	–	–
M72	250.000	–	312.500	–	–	–	–	–	–	–	–	–	–
M80	333.333	–	–	–	–	–	–	–	–	–	–	–	–
M90	454.545	–	–	–	–	–	–	–	–	–	–	–	–
M100	625.000	–	–	–	–	–	–	–	–	–	–	–	–

Washer Weight Chart / Washer Weight in kg — Estimated Weight per 100 Pieces (kg)

This combined washer reference covers ten washer families in one matrix — plain punched and machined washers to IS 2016, structural (HSS) washers to IS 6649 Type A, heavy-duty washers to IS 6610, square taper washers for channel and I-beam flanges (machined to IS 5372 / IS 5374 and HSFG Type B / Type C to IS 6649), flat-section spring washers to IS 3063 and square-section spring washers to IS 6735 / DIN 7980 — plus inch-series plain punched washers to BS 3410 Table 7 in the final columns. All figures are indicative weights in kilograms per 100 washers; a dash means that size is not produced in that washer style.

Metric Size	Plain Punched Washer IS 2016	Structural (HSS) Washer IS 6649 Type A	Heavy-Duty Washer IS 6610	Machined Washer IS 2016	Sq. Taper Washer, Machined (Channels) IS 5372	Sq. Taper Washer, Machined (I-Beams) IS 5374	Sq. Taper Washer HSFG Type B (Channels) IS 6649	Sq. Taper Washer HSFG Type C (I-Beams) IS 6649	Spring Washer, Flat Section IS 3063	Spring Washer, Square Section IS 6735 / DIN 7980	Inch Size	Plain Punched Washer BS 3410 (Table 7)
M-3	–	–	–	–	–	–	–	–	0.01	0.01	–	–
M-4	–	–	–	–	–	–	–	–	0.02	0.02	–	–
M-5	0.04	–	–	0.04	–	–	–	–	0.03	0.03	–	–
M-6	0.11	–	–	0.11	–	–	–	–	0.08	0.04	1/4″	0.21
M-8	0.20	–	–	0.21	1.10	1.20	–	–	0.16	0.11	5/16″	0.35
M-10	0.39	–	1.60	0.40	1.00	1.10	–	–	0.25	0.20	3/8″	0.48
M-12	0.58	–	1.90	0.62	2.00	2.20	2.00	1.80	0.38	0.23	1/2″	1.07
M-14	0.82	–	–	–	–	–	–	–	0.60	0.38	–	–
M-16	1.06	2.03	2.90	1.13	3.40	3.75	9.00	8.50	0.89	0.59	5/8″	1.85
M-18	1.27	–	–	–	–	–	–	–	0.97	0.66	–	–
M-20	1.64	3.13	4.40	1.72	5.80	6.70	8.50	8.00	1.52	1.23	3/4″	2.91
M-22	1.75	3.32	–	–	–	–	7.50	7.00	1.65	1.36	7/8″	4.27
M-24	3.11	4.47	6.30	3.30	13.50	16.00	6.50	6.00	2.62	1.81	1″	6.13
M-27	3.94	5.48	8.00	4.23	12.50	15.00	12.00	11.50	2.87	2.06	1.1/8″	7.69
M-30	5.05	6.14	10.10	5.36	16.50	18.70	17.50	16.00	4.43	3.20	1.1/4″	9.90
M-33	7.10	–	12.00	7.54	21.00	23.50	23.00	22.50	6.30	3.50	–	–
M-36	8.73	8.97	14.60	9.20	25.50	29.20	26.50	26.00	6.73	5.25	1.1/2″	17.24
M-39	12.60	–	16.70	13.30	28.30	34.50	–	–	7.17	5.61	–	–
M-42	17.50	–	20.10	18.30	–	–	–	–	11.10	8.00	–	–
M-45	21.20	–	22.20	22.00	–	–	–	–	11.70	8.53	–	–
M-48	28.40	–	26.00	29.40	–	–	–	–	12.30	9.00	2″	27.78
M-52	31.90	–	–	33.00	–	–	–	–	18.20	–	–	–
M-56	47.90	–	–	–	–	–	–	–	19.30	–	–	–
M-60	51.60	–	–	–	–	–	–	–	20.30	–	–	–
M-64	55.40	–	–	–	–	–	–	–	21.80	–	–	–
M-68	57.40	–	–	–	–	–	–	–	–	–	–	–
M-72	63.40	–	–	–	–	–	–	–	24.00	–	–	–

BSW (Whitworth) Hexagon Bolts (Full Thread) with Nuts — Estimated Weight per 100 Sets (kg)

Estimated weight of 100 fully-threaded mild-steel BSW (inch / Whitworth) hex bolt & nut sets (to BS 916), by nominal diameter and length, in kilograms per 100 pieces (approximate).

Length ↓ / Dia →	1/4″	5/16″	3/8″	7/16″	1/2″	5/8″	3/4″	7/8″	1″	1.1/8″	1.1/4″	1.1/2″
3/8″	0.823	–	–	–	–	–	–	–	–	–	–	–
1/2″	0.878	1.420	–	–	–	–	–	–	–	–	–	–
5/8″	0.948	1.511	2.356	–	–	–	–	–	–	–	–	–
3/4″	1.008	1.629	2.513	4.195	6.266	–	–	–	–	–	–	–
1″	1.139	1.804	2.882	4.647	6.693	12.195	–	–	–	–	–	–
1.1/4″	1.257	1.990	3.159	4.995	7.184	12.987	21.008	27.473	–	–	–	–
1.1/2″	1.349	2.151	3.344	5.556	9.615	15.873	24.390	32.051	47.619	64.103	83.333	125.000
1.3/4″	1.493	2.326	3.623	6.024	10.309	16.949	25.906	34.483	50.505	67.568	90.909	142.857
2″	1.639	2.532	3.937	6.579	11.236	18.519	27.778	37.037	55.556	71.429	100.000	166.667
2.1/2″	1.923	2.933	4.587	7.634	13.123	21.645	32.051	43.103	64.103	83.333	111.111	192.308
3″	2.198	3.344	5.236	8.696	14.925	24.691	36.765	49.020	71.429	92.593	125.000	208.333
3.1/2″	2.475	3.759	5.882	9.709	16.667	27.778	41.667	54.945	79.365	103.093	142.857	227.273
4″	2.755	4.167	6.536	10.753	18.519	30.864	45.045	59.524	86.207	113.636	158.730	250.000
4.1/2″	3.030	4.579	7.194	11.799	20.408	33.557	49.020	64.935	92.593	119.048	166.667	277.778
5″	3.313	5.000	7.874	12.821	22.173	36.232	52.632	71.429	100.000	128.205	178.571	312.500
6″	3.876	5.814	9.174	15.038	25.641	41.667	59.524	79.365	111.111	142.857	192.308	357.143
7″	–	–	–	17.857	29.412	47.170	67.114	90.909	125.000	166.667	217.391	416.667
8″	–	–	–	20.161	33.333	52.632	73.529	100.000	138.889	178.571	238.095	454.545
9″	–	–	–	22.727	37.037	58.824	80.645	111.111	151.515	192.308	263.158	500.000
10″	–	–	–	25.253	41.667	64.103	90.909	125.000	166.667	217.391	294.118	555.556
12″	–	–	–	29.412	47.619	72.464	102.041	142.857	192.308	250.000	333.333	625.000
14″	–	–	–	–	55.556	83.333	119.048	166.667	217.391	277.778	384.615	714.286
16″	–	–	–	–	62.500	92.593	133.333	185.185	238.095	312.500	416.667	769.231
18″	–	–	–	–	71.429	103.093	147.059	208.333	263.158	333.333	454.545	833.333
20″	–	–	–	–	76.923	111.111	166.667	227.273	294.118	357.143	500.000	909.091

BSW (Whitworth) Hexagon Bolts (Part / Half Thread) with Nuts — Estimated Weight per 100 Sets (kg)

Estimated weight of 100 part-threaded (half-thread) mild-steel BSW (inch / Whitworth) hex bolt & nut sets (to BS 916), by nominal diameter and length, in kilograms per 100 pieces (approximate).

Length ↓ / Dia →	1/4″	5/16″	3/8″	7/16″	1/2″	5/8″	3/4″	7/8″	1″	1.1/8″	1.1/4″	1.1/2″	2″
3/4″	1.111	–	–	–	–	–	–	–	–	–	–	–	–
1″	1.252	2.041	3.123	4.950	–	–	–	–	–	–	–	–	–
1.1/4″	1.401	2.281	3.458	5.388	7.692	13.966	–	–	–	–	–	–	–
1.1/2″	1.556	2.523	3.797	5.875	8.306	14.925	23.810	29.240	–	–	–	–	–
1.3/4″	1.705	2.762	4.132	6.329	8.897	15.924	25.253	31.056	45.045	–	–	–	–
2″	1.864	3.003	4.468	6.793	9.506	16.949	26.882	32.680	47.619	–	–	–	–
2.1/4″	2.005	3.245	4.826	7.246	10.121	17.921	28.249	34.483	50.505	70.423	–	–	–
2.1/2″	2.159	3.484	5.144	7.704	10.707	18.868	29.762	36.765	52.632	73.529	98.039	156.250	312.500
3″	2.459	3.965	5.814	8.621	11.933	20.921	32.468	40.323	56.818	79.365	106.383	166.667	333.333
3.1/2″	2.762	4.444	6.485	9.542	13.123	22.831	35.714	43.860	60.976	84.746	113.636	178.571	333.333
4″	3.075	4.926	7.153	10.460	14.327	24.876	38.462	48.544	66.667	90.909	119.048	185.185	357.143
4.1/2″	3.367	5.405	7.813	11.364	15.528	26.882	40.984	51.546	69.444	98.039	128.205	192.308	384.615
5″	3.655	5.903	8.475	12.285	16.779	28.902	43.860	54.945	76.923	102.041	135.135	208.333	384.615
5.1/2″	3.946	6.386	9.141	13.158	17.921	30.864	47.170	58.824	81.967	108.696	147.059	227.273	416.667
6″	4.237	6.868	9.804	14.085	19.157	32.680	50.505	63.291	86.207	116.279	156.250	238.095	416.667
7″	–	–	–	–	20.833	34.722	53.763	73.529	96.154	128.205	172.414	250.000	500.000
8″	–	–	–	–	23.585	38.462	58.140	79.365	106.383	142.857	185.185	277.778	555.556
9″	–	–	–	–	25.907	42.735	64.935	87.719	116.279	156.250	200.000	312.500	555.556
10″	–	–	–	–	28.736	47.619	71.429	96.154	125.000	166.667	217.391	333.333	625.000
11″	–	–	–	–	31.250	50.505	75.758	104.167	135.135	178.571	238.095	357.143	714.286
12″	–	–	–	–	33.557	53.763	80.645	113.636	147.059	192.308	250.000	384.615	714.286
14″	–	–	–	–	38.462	60.976	92.593	125.000	166.667	217.391	277.778	416.667	833.333
16″	–	–	–	–	43.478	68.493	104.167	142.857	185.185	238.095	312.500	500.000	1,000.000
18″	–	–	–	–	48.544	76.923	113.636	156.250	208.333	263.158	333.333	555.556	1,000.000
20″	–	–	–	–	53.763	84.746	125.000	172.414	227.273	294.118	384.615	625.000	1,250.000

Estimating a Full Bolt-Nut-Washer Set

For flanged joints and structural connections it helps to weigh the complete set. Add the bolt, nut(s) and washer(s):

Example set	Bolt (g)	Nut (g)	Washers (g)	Set total (g)	Per 100 sets (kg)
M12 × 50, 1 nut, 2 washers	~62	~16	~9	~87	~8.7
M16 × 60, 1 nut, 2 washers	~145	~33	~18	~196	~19.6
M20 × 80, 1 nut, 2 washers	~300	~62	~32	~394	~39.4

How to Use This Chart

Identify the fastener: note the type (hex bolt, nut, washer), thread system (metric M or BSW inch), diameter and — for bolts — length.

Read the value: find the row/column in the relevant table for weight per piece (g) or weight per 100 pieces (kg).

Convert count ↔ weight: use pieces per kg = 1000 ÷ weight per piece (g), or kg per 100 = weight per piece (g) ÷ 10.

Adjust for material: multiply by the density factor (e.g. ~1.02 stainless, ~0.34 aluminium) if not carbon steel.

Sum & verify: add bolt + nut + washer for a full set, multiply by quantity, and confirm against certified data for critical or commercial estimates.

Frequently Asked Questions

Q1. How do you calculate the number of fasteners per kilogram?

Divide 1000 by the weight of one fastener in grams: pieces per kg = 1000 / (weight per piece in grams). For example, if one M10 hex nut weighs about 10 grams, then 1000 / 10 = about 100 nuts per kilogram. The figure is approximate because head style, thread length, tolerance and surface finish all vary the real weight.

Q2. How is the weight of a bolt calculated?

The weight of a bolt is estimated from its volume multiplied by the material density. For steel (about 7.85 g/cm³), a quick estimate adds the head volume to the shank volume: weight (g) = 7.85 × volume in cm³. Charts simplify this by tabulating the weight per piece (or per 100 pieces) against nominal diameter and length, which is faster than calculating each size by hand.

Q3. What is weight per 100 pieces for fasteners?

Weight per 100 pieces is the weight in kilograms of 100 identical fasteners. It is a common bulk-ordering and packing figure: weight per 100 pieces (kg) = weight per piece (grams) / 10. So a bolt weighing 9 grams each is about 0.90 kg per 100 pieces. Multiply by the quantity in hundreds to estimate a consignment weight.

Q4. Why are fastener weights only approximate?

Tabulated fastener weights are approximate because the real weight depends on head type (hex, socket, flange), thread length (full vs half thread), pitch, chamfers, tolerance class, and any coating or plating. Charts give a representative value for plain steel of standard pattern; always confirm the actual weight from the manufacturer's drawing or a sample weighing for critical estimates.

Q5. How do I convert a steel fastener weight to stainless steel, brass or aluminium?

Multiply the carbon-steel weight by the density ratio of the new material. Using carbon steel (7.85 g/cm³) as 1.00: stainless steel is about 1.02, brass about 1.08, copper about 1.13, Monel about 1.12, titanium about 0.57 and aluminium about 0.34. For example, a stainless M12 bolt weighs roughly 2% more than the same steel bolt, while an aluminium one weighs only about a third.

Q6. Does thread length affect fastener weight?

Yes, but only slightly. A fully threaded bolt is marginally lighter than a half-threaded bolt of the same diameter and length because cutting the thread removes a little metal from the shank. For estimation the difference is usually small, so a single weight-per-length value is typically used; for precise consignment weights use the specific full-thread or half-thread figure.

Q7. How do I estimate the total weight of a bolt-nut-washer assembly?

Add the weight of each component: bolt + nut(s) + washer(s). For example, an M16 × 60 mm bolt (about 145 g) with one nut (about 33 g) and two washers (about 18 g) totals roughly 196 g per set, or about 19.6 kg per 100 sets. Charts that list each component separately make this addition quick.

Q8. What is the difference between metric (M) and BSW fastener sizes?

Metric (M) fasteners are sized by nominal diameter in millimetres with a metric thread pitch (e.g. M12), per IS 1363/1367 and ISO. BSW (British Standard Whitworth) fasteners are sized in inches with a Whitworth 55-degree thread (e.g. 1/2 inch), per BS 916. They are not interchangeable; weight charts list each system separately because diameters and thread forms differ.

Q9. Is this fastener weight chart suitable for ordering and freight estimates?

It is suitable for budgetary ordering, packing and freight estimates, where an approximate weight is acceptable. The pieces-per-kg and weight-per-100-pieces figures let you convert between count and weight quickly. For commercial invoicing or precise logistics, confirm the exact weight against the supplier's certified figures or a verified sample.

Q10. Does Tesco Steel & Engineering supply fasteners with flanges?

Tesco Steel & Engineering specialises in pipe flanges and can advise on matching stud bolts, nuts and gaskets for flanged joints to ASME B16.5 and B16.47. For flange bolting sizes and quantities use this chart together with our flange dimension and RTJ gasket charts, and contact our team for a complete flange, bolting and gasket package.