Torque and Preload Table for DIN metric screws

Torque and Preload Table for Metric Bolts

DIN912 DIN931 DIN934 DIN6912 DIN7984 DIN7990

N = preload / Nm = tightening torque

Torque Pre Load Force Coarse Thread Metric Screws Fabricated Project

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All torques (Nm) and preloads or tensile forces (N) correspond to the standard values for metric threads according to DIN 13. Screw head dimensions comply with DIN 912,931,934,6912,7984 e 7990. Using an elastic limit of 90% ( coefficient of friction 0,14 – new, non-lubricated screw). It is recommended to reduce the torques by 20% when applying MOS2 lubrication (or similar), especially for cadmium-coated surfaces.

N = preload
Nm = tightening torque

Screw Size (thick metric)	key opening (mm)	Class 3.6(4D) Pre_Load (N)	Class 3.6(4D) Torque (Nm)	Class 5.6(5D) Pre_Load (N)	Class 5.6(5D) Torque (Nm)	Class 6.9(6G) Pre_Load (N)	Class 6.9(6G) Torque (Nm)	Class 8.8(8G) Pre_Load (N)	Class 8.8(8G) Torque (Nm)	Class 10.9(10K) Pre_Load (N)	Class 10.9(10K) Torque (Nm)	Class 12.9(12K) Pre_Load (N)	Class 12.9(12K) Torque (Nm)
M2	4	284	0.12	378	0.16	731	0.31	863	0.37	1216	0.52	1461	0.63
M2.3	4.5	407	0.2	544	0.26	1049	0.51	1245	0.6	1755	0.84	2099	1.01
M2.6	5	525	0.28	701	0.37	1353	0.73	1598	0.86	2246	1.21	2697	1.45
M3	5.5	726	0.44	966	0.59	1863	1.13	2207	1.34	3109	1.88	3727	2.26
M3,5	6	971	6.8	1294	0.9	2501	1.74	2962	2.06	4168	2.89	5001	3.48
M4	7	1255	1	1677	1.34	3226	2.6	3825	3.04	5374	4.31	6453	5.15
M5	8 9	2059	1.96	2736	2.65	5286	5.10	6257	6.03	8806	8.48	10591	10.2
M6	10	2903	3.43	3864	4.51	7453	8.73	8836	10.3	12405	14.71	14906	17.65
M7	10 12	4237	5.59	5649	7.45	10885	14.22	12945	17.16	18191	24.52	21771	28.44
M8	13 14	5315	8.24	7090	10.79	13680	21.57	16230	25.5	22752	35h30	27361	42.17
M10	15 16 17	8473	16.67	11278	21.57	21771	42.17	25792	50.01	36285	70.61	43542	85.32
M12	18 19 20	12356	28.44	16475	38.25	31773	73.55	37658	87.28	52956	122.58	63547	147.10
M14	21 22 23	16966	45.11	22654	60.8	43640	116.7	51681	138.27	72668	194.17	87280	235.36
M16	24 25 26	23340	69.63	31087	93.16	60017	178.48	71197	210.84	100028	299.1	120132	357.94
M18	27 28	28341	95.13	37854	127.49	72962	245.17	86495	289.3	121603	411.88	146120	490.34
M20	30	36481	135.33	48641	180.44	93850	348.14	111306	411.88	156417	578.5	187798	696.28
M22	32 34	45601	182.4	60802	245.17	117190	470.72	139255	558.98	195644	784.54	234380	941.44
M24	36	52564	230.46	70020	308.91	135333	598.21	160340	710.99	225554	1000.28	270665	1196.42
M27	41	69235	343.23	92281	460.92	177992	887.51	210844	1049.32	296163	1480.81	355984	1775.01
M30	46	84044	465.82	112287	622.73	215748	1206.23	255955	1421.97	359906	2010.38	432476	2402.64
M33	50	104932	632.53	139746	848.28	269685	1627.91	319699	1931.92	449147	2716.46	539369	3265.63
M36	55	123074	813.96	164263	1088.54	316757	2098.64	374616	2481.10	527601	3491.19	632533	4197.27
M39	60	148081	1059.12	197115	1412.17	380500	2716.46	451109	3226.41	633513	4530.7	761001	5442.72
M42	65	169166	1304.29	225554	1745.59	435418	3363.7	515833	3991.33	725697	5609.44	870836	6727.4
M45	70	198096	1637.72	264781	2177.09	509949	4207.08	604093	4991.62	850242	7011.80	1019899	8414.16
M48	75	222612	1980.96	297143	2638	573693	6060.55	679605	6021.32	956154	8473.0	1147385	10149.94
M52	80	267723	2539.94	356964	3393.12	688431	6541.08	815918	7747.30	1147385	10885.45	1377843	13091.96
M56	85	308911	3167.57	411882	4226.69	793363	8149.38	940463	9649.8	1323906	13582.29	1588687	16279.14
M60	90	360887	3932.49	481509	5246.59	927715	10100.91	1098351	11964.19	1544557	16867.54	1853468	20201.82
M64	95	407959	4736.64	544272	6305.71	1049318	12160.32	1245452	14415.86	1750498	20299.89	2098636	24320.64
M68	100	466017	5788	622110	7727	1198976	14891	1420672	17645	1997539	24809	2395691	29754
M72	105	526881	6913	703360	9228	1355568	17785	1606220	21074	2258427	29631	2708578	35537
M76	110	599212	8275	799919	11047	1541663	21290	1826725	25227
M80	115	671179	9625	895991	12849	1726819	24763	2046118	29341
M90	130	868630	14098	1536700	24941	2234824	36271	2648055	42978
M100	145	1091415	19613	1656985	26182	2808008	50460	3327225	59790
M110	155	1339625	26391	1788335	35230	3446609	67898	4083906	80453
M120	175	1613269	34588	2153636	46174	4150644	88990
M130	185	1911957	443000	2553238	59159	4920786	114015
M140	200	2237179	55706	3115172	77568	5755849	143321
M150	210	2586543	68906	3452910	91986	6654699	177281