Torque Guide for Nord-Lock Washers

			Oil, G_F = 75% μ_th = 0.15, μ_h = 0.19		Cu/C paste, G_F = 75% μ_th = 0.13, μ_h = 0.18		Dry, G_F = 62% μ_th = 0.18, μ_h = 0.2
Bolt Size	Product Name	Pitch [mm]	Torque [Nm]	Clamp Load [kN]	Torque [Nm]	Clamp Load [kN]	Torque [Nm]	Clamp Load [kN]
M3	NL3	0.5	1.7	2.4	1.5	2.4	1.5	2
M4	NL4	0.7	3.8	4.2	3.6	4.2	3.5	3.5
M5	NL5	0.8	7.5	6.8	6.9	6.8	6.8	5.6
M6	NL6	1	13	9.7	12.1	9.7	12	8
M8	NL8	1.25	32	18	29	18	29	15
M10	NL10	1.5	62	28	57	28	56	23
M12	NL12	1.75	107	40	99	40	97	33
M14	NL14	2	170	55	157	55	155	46
M16	NL16	2	260	75	240	75	237	62
M18	NL18	2.5	364	92	336	92	331	76
M20	NL20	2.5	510	118	470	118	464	97
M22	NL22	2.5	696	146	642	146	634	120
M24	NL24	3	878	169	809	169	800	140
M27	NL27	3	1 ,284	221	1183	221	1172	182
M30	NL30	3.5	1750	269	1613	269	1596	222
M33	NL33	3.5	2360	333	2173	333	2155	275
M36	NL36	4	3043	392	2803	392	2776	324
M39	NL39	4	3931	468	3619	468	3589	387
M42	NL42	4.5	4860	538	4476	538	4436	445

_{Cu/C paste = Copper/graphite paste (Molykote® 1000)
Oil = WD40 has been used.
G_F = Ratio of yield point. When tightening according to guidelines and with no deviation, this is the pre-stress achieved expressed as % of yield point.
μ_th = Thread friction coefficient
μ_h = Under head friction coefficient
1 N = 0.225 lb
1 Nm = 0.738 ft-lb}

_{Thread friction coefficients have theoretical values but are verified through testing.
Under head friction coefficients have been established by tests.}

			Oil, G_F = 71% μ_th = 0.15, μ_h = 0.13		Cu/C paste, G_F = 75% μ_th = 0.13, μ_h = 0.14
Bolt Size	Product Name	Pitch [mm]	Torque [Nm]	Clamp Load [kN]	Torque [Nm]	Clamp Load [kN]
M3	NL3	0.5	2	3.2	2	3.4
M4	NL4	0.7	4.5	5.6	4.5	5.9
M5	NL5	0.8	8.9	9.1	8.9	9.6
M6	NL6	1	15.5	12.9	15.5	13.6
M8	NL8	1.25	37	23	37	25
M10	NL10	1.5	73	37	73	39
M12	NL12	1.75	126	54	126	57
M14	NL14	2	201	74	201	78
M16	NL16	2	307	100	306	106
M18	NL18	2.5	430	123	429	130
M20	NL20	2.5	602	156	600	165
M22	NL22	2.5	821	194	818	205
M24	NL24	3	1036	225	1034	238
M27	NL27	3	1514	294	1509	310
M30	NL30	3.5	2064	358	2058	378
M33	NL33	3.5	2782	443	2772	468
M36	NL36	4	3589	522	3576	551
M39	NL39	4	4632	624	4613	659
M42	NL42	4.5	5731	716	5709	757

_{Cu/C paste = Copper/graphite paste (Molykote® 1000)
Oil = WD40 has been used.
G_F = Ratio of yield point. When tightening according to guidelines and with no deviation, this is the pre-stress achieved expressed as % of yield point.}_{μ_th = Thread friction coefficient
μ_h = Under head friction coefficient
1 N = 0.225 lb
1 Nm = 0.738 ft-lb}

_{Thread friction coefficients have theoretical values but are verified through testing.
Under head friction coefficients have been established by tests.}

			Oil, G_F=71% μ_th= 0.15, μ_h= 0.13		Cu/C paste, G_F=75% μ_th = 0.13, μ_h = 0.14
Bolt Size	Product Name	Pitch [mm]	Torque [Nm]	Clamp Load [kN]	Torque [Nm]	Clamp Load [kN]
M3	NL3	0.5	2.2	3.9	2.3	4.1
M4	NL4	0.7	5.1	6.7	5.3	7.1
M5	NL5	0.8	10	10.9	10.3	11.5
M6	NL6	1	17.4	15.4	18	16.3
M8	NL8	1.25	42	28	43	30
M10	NL10	1.5	82	44	85	47
M12	NL12	1.75	142	65	146	68
M14	NL14	2	226	89	233	94
M16	NL16	2	345	120	355	127
M18	NL18	2.5	483	148	498	156
M20	NL20	2.5	676	188	696	198
M22	NL22	2.5	921	233	948	246
M24	NL24	3	1165	270	1199	286
M27	NL27	3	1700	352	1749	372
M30	NL30	3.5	2316	430	2386	454
M33	NL33	3.5	3124	532	3213	562
M36	NL36	4	4029	626	4145	662
M39	NL39	4	5199	748	5346	790
M42	NL42	4.5	6434	860	6617	908

_{Cu/C paste = Copper/graphite paste (Molykote® 1000)
Oil = WD40 has been used.
G_F = Ratio of yield point. When tightening according to guidelines and with no deviation, this is the pre-stress achieved expressed as % of yield point.
μ_th = Thread friction coefficient
μ_h = Under head friction coefficient
1 N = 0.225 lb
1 Nm = 0.738 ft-lb}

_{Thread friction coefficients have theoretical values but are verified through testing.
Under head friction coefficients have been established by tests.}

			A4-70 Cu/C paste G_F = 65%, μ_th= 0.13, μ_h= 0.13		A4-80 Cu/C paste G_F = 65%, μ_th = 0.13, μ_h = 0.13
Bolt Size	Product Name	Pitch [mm]	Torque [Nm]	Clamp Load [kN]	Torque [Nm]	Clamp Load [kN]
M3	NL3 ss	0.5	0.8	1.5	1.1	2
M4	NL4 ss	0.7	1.8	2.6	2.4	3.4
M5	NL5 ss	0.8	3.6	4.1	4.8	5.5
M6	NL6 ss	1	6.3	5.9	8.4	7.8
M8	NL8 ss	1.25	15	11	20	14
M10	NL10 ss	1.5	30	17	39	23
M12	NL12 ss	1.75	51	25	68	33
M14	NL14 ss	2	81	34	108	45
M16	NL16 ss	2	124	46	165	61
M18	NL18 ss	2.5	173	56	231	75
M20	NL20 ss	2.5	243	72	323	95
M22	NL22 ss	2.5	330	89	440	118
M24	NL24 ss	3	418	103	557	137
M27	NL27 ss	3	609	134	812	179
M30	NL30 ss	3.5	831	164	1108	219
M36	NL36ss	4	1444	239	1925	319

_{Cu/C paste = Copper/graphite paste (Molykote® 1000)
G_F = Ratio of yield point. When tightening according to guidelines and with no deviation, this is the pre-stress achieved expressed as % of yield point.
μ_th = Thread friction coefficient
μ_h = Under head friction coefficient
1 N = 0.225 lb
1 Nm = 0.738 ft-lb}

_{Thread friction coefficients have theoretical values but are verified through testing.
Under head friction coefficients have been established by tests.}

			A4-70 Cu/C paste G_F = 65%, μ_th= 0.13, μ_h= 0.13		A4-80 Cu/C paste G_F = 65%, μ_th = 0.13, μ_h = 0.13
Bolt Size	Product Name	Pitch [mm]	Torque [Nm]	Clamp Load [kN]	Torque [Nm]	Clamp Load [kN]
M3	NL3 ss-254	0.5	0.8	1.5	1.1	2
M4	NL4 ss-254	0.7	1.8	2.6	2.4	3.4
M5	NL5 ss-254	0.8	3.6	4.1	4.8	5.5
M6	NL6 ss-254	1	6.3	5.9	8.4	7.8
M8	NL8 ss-254	1.25	15	11	20	14
M10	NL10 ss-254	1.5	30	17	39	23
M12	NL12 ss-254	1.75	51	25	68	33
M14	NL14 ss-254	2	81	34	108	45
M16	NL16 ss-254	2	124	46	165	61
M18	NL18 ss-254	2.5	173	56	231	75
M20	NL20 ss-254	2.5	243	72	323	95
M22	NL22 ss-254	2.5	330	89	440	118
M24	NL24 ss-254	3	418	103	557	137
M27	NL27 ss-254	3	609	134	812	179
M30	NL30 ss-254	3.5	831	164	1108	219
M36	NL36ss-254	4	1444	239	1925	319

_{Cu/C paste = Copper/graphite paste (Molykote® 1000)
G_F = Ratio of yield point. When tightening according to guidelines and with no deviation, this is the pre-stress achieved expressed as % of yield point.
μ_th = Thread friction coefficient
μ_h = Under head friction coefficient
1 N = 0.225 lb
1 Nm = 0.738 ft-lb}

_{Thread friction coefficients have theoretical values but are verified through testing.
Under head friction coefficients have been established by tests.}

			Oil, G_F = 75% μ_th = 0.15, μ_h = 0.19		Cu/C paste, G_F = 75% μ_th = 0.13, μ_h = 0.18		Dry, G_F = 62% μ_th = 0,18, μ_h = 0,2
Bolt Size	Product Name	Pitch [mm]	Torque [Nm]	Clamp Load [kN]	Torque [Nm]	Clamp Load [kN]	Torque [Nm]	Clamp Load [kN]
M6	NLX6	1	13	9.7	12	9.7	12	8
M8	NLX8	1.25	32	18	29	18	29	15
M10	NLX10	1.5	62	28	57	28	56	23
M12	NLX12	1.75	107	40	99	40	97	33
M14	NLX14	2	170	55	157	55	155	46
M16	NLX16	2	260	75	240	75	237	62
M20	NLX20	2.5	510	118	470	118	464	97

_{Cu/C paste = Copper/graphite paste (Molykote® 1000)
Oil = WD40 has been used.
G_F = Ratio of yield point. When tightening according to guidelines and with no deviation, this is the pre-stress achieved expressed as % of yield point.
μ_th = Thread friction coefficient
μ_h = Under head friction coefficient
1 N = 0.225 lb
1 Nm = 0.738 ft-lb}

_{Thread friction coefficients have theoretical values but are verified through testing.
Under head friction coefficients have been established by tests.}

			Oil, G_F = 71% μ_th = 0.15, μ_h = 0.13		Cu/C paste, G_F = 75% μ_th = 0.13, μ_h = 0.14
Bolt Size	Product Name	Pitch [mm]	Torque [Nm]	Clamp Load [kN]	Torque [Nm]	Clamp Load [kN]
M6	NLX6	1	15.5	12.9	15.5	13.6
M8	NLX8	1.25	37	23	37	25
M10	NLX10	1.5	73	37	73	39
M12	NLX12	1.75	126	54	126	57
M14	NLX14	2	201	74	201	78
M16	NLX16	2	307	100	306	106
M20	NLX20	2.5	602	156	600	165

_{Cu/C paste = Copper/graphite paste (Molykote® 1000)
Oil = WD40 has been used.
G_F = Ratio of yield point. When tightening according to guidelines and with no deviation, this is the pre-stress achieved expressed as % of yield point.
μ_th = Thread friction coefficient
μ_h = Under head friction coefficient
1 N = 0.225 lb
1 Nm = 0.738 ft-lb}

_{Thread friction coefficients have theoretical values but are verified through testing.
Under head friction coefficients have been established by tests.}

			Oil, G_F = 75% μ_th = 0.08, μ_h = 0.18		Cu/C paste, G_F = 75% μ_th = 0.08, μ_h = 0.19		Dry, G_F = 62% μ_th = 0.19, μ_h = 0.2
Bolt Size	Product Name	Pitch [TPI]	Torque [ftlb]	Clamp Load [lb]	Torque [ftlb]	Clamp Load [lb]	Torque [ftlb]	Clamp Load [lb]
#5	NL3	40	1.1	559	1.1	559	1.1	410
#6	NL3.5	32	1.4	640	1.5	640	1.4	469
#8	NL4	32	2.5	983	2.6	983	2.5	721
#10	NL5	24	3.7	1234	3.9	1234	3.7	905
1/4	NL1/4"	20	8.8	2235	9.1	2235	8.8	1639
5/16	NL8	18	18	3674	18	3674	18	2694
3/8	NL3/8"	16	31	5424	32	5424	31	3978
7/16	NL11	14	49	7439	50	7439	50	5455
1/2	NL1/2"	13	75	9920	77	9920	76	7271
9/16	NL14	12	107	12712	111	12712	109	9322
5/8	NL16	11	148	15786	153	15786	151	11576
3/4	NL3/4"	10	258	23335	267	23335	266	17112
7/8	NL22	9	414	32195	429	32195	427	23609
1	NL1"	8	627	42228	650	42228	645	30967
1 1/8	NL30	7	784	46860	812	46860	806	34364
1 1/4	NL33	7	1091	59427	1130	59427	1127	43580
1 3/8	NL36	6	1433	70864	1485	70864	1478	51967
1 1/2	NL39	6	1880	86147	1949	86147	1949	63174

_{Cu/C paste = Copper/graphite paste (Molykote® 1000)
Oil = WD40 has been used.
G_F = Ratio of yield point. When tightening according to guidelines and with no deviation, this is the pre-stress achieved expressed as % of yield point.
μ_th = Thread friction coefficient
μ_h = Under head friction coefficient
1 lbf = 4.448 N
1 ft-lb = 1.356 Nm}

_{Thread friction coefficients have theoretical values but are verified through testing.
Under head friction coefficients have been established by tests.}

			Oil, G_F = 71% μ_th = 0.08, μ_h = 0.14		Cu/C paste, G_F = 75% μ_th = 0.07, μ_h = 0.15
Bolt Size	Product Name	Pitch [TPI]	Torque [ftlb]	Clamp Load [lb]	Torque [ftlb]	Clamp Load [lb]
#5	NL3	40	1.3	748	1.3	790
#6	NL3.5	32	1.6	856	1.7	905
#8	NL4	32	2.9	1315	3.0	1389
#10	NL5	24	4.3	1651	4.6	1744
1/4	NL1/4"	20	10.0	2990	11.0	3159
5/16	NL8	18	20.0	4915	22	5192
3/8	NL3/8"	16	36	7256	38	7665
7/16	NL11	14	56	9951	60	10511
1/2	NL1/2"	13	86	13270	91	14017
9/16	NL14	12	123	16771	131	17963
5/8	NL16	11	170	21117	180	22307
3/4	NL3/4"	10	296	31214	315	32973
7/8	NL22	9	475	43067	505	45493
1	NL1"	8	718	56488	764	59671
1 1/8	NL30	7	1020	71192	1085	75203
1 1/4	NL33	7	1417	90284	1506	95370
1 3/8	NL36	6	1864	107660	1982	113725
1 1/2	NL39	6	2445	130878	2598	138251

_{Cu/C paste = Copper/graphite paste (Molykote® 1000)
Oil = WD40 has been used.
G_F = Ratio of yield point. When tightening according to guidelines and with no deviation, this is the pre-stress achieved expressed as % of yield point.
μ_th = Thread friction coefficient
μ_h = Under head friction coefficient
1 lbf = 4.448 N
1 ft-lb = 1.356 Nm}

_{Thread friction coefficients have theoretical values but are verified through testing.
Under head friction coefficients have been established by tests.}

			Oil, G_F = 65% μ_th = 0.06, μ_h = 0.1		Cu/C paste, G_F = 70% μ_th = 0.07, μ_h = 0.09
Bolt Size	Product Name	Pitch [TPI]	Torque [ftlb]	Clamp Load [lb]	Torque [ftlb]	Clamp Load [lb]
#5	NL3	40	1.2	840	1.2	905
#6	NL3.5	32	1.4	962	1.5	1036
#8	NL4	32	2.5	1478	2.7	1591
#10	NL5	24	3.8	1855	4.1	1998
1/4	NL1/4"	20	8.9	3360	9.5	3618
5/16	NL8	18	18.0	5522	19.0	5947
3/8	NL3/8"	16	31	8152	33	8779
7/16	NL11	14	49	11180	52	12040
1/2	NL1/2"	13	74	14909	79	16056
9/16	NL14	12	106	19106	113	20575
5/8	NL16	11	146	23726	156	25551
3/4	NL3/4"	10	254	35071	272	37769
7/8	NL22	9	407	48388	435	52110
1	NL1"	8	614	63468	656	68350
1 1/8	NL30	7	873	79988	932	86141
1 1/4	NL33	7	1208	101439	1290	109242
1 3/8	NL36	6	1594	120691	1702	130266
1 1/2	NL39	6	2083	147048	2225	158360

_{Cu/C paste = Copper/graphite paste (Molykote® 1000)
Oil = WD40 has been used.
G_F = Ratio of yield point. When tightening according to guidelines and with no deviation, this is the pre-stress achieved expressed as % of yield point.
μ_th = Thread friction coefficient
μ_h = Under head friction coefficient
1 lbf = 4.448 N
1 ft-lb = 1.356 Nm}

_{Thread friction coefficients have theoretical values but are verified through testing.
Under head friction coefficients have been established by tests.}

			316ss Cu/C paste, G_F = 65%		304ss Cu/C paste, G_F = 70%
Bolt Size	Product Name	Pitch [TPI]	Torque [ftlb]	Clamp Load [lb]	Torque [ftlb]	Clamp Load [lb]
#5	NL3ss	40	0.6	342	0.7	342
#6	NL3.5ss	32	0.8	392	0.9	392
#8	NL4ss	32	1.4	602	1.5	602
#10	NL5ss	24	2.1	756	2.3	756
1/4	NL1/4”ss	20	5.1	1368	5.3	1368
5/16	NL8ss	18	10.0	2249	11.0	2249
3/8	NL3/8”ss	16	18	3320	19	3320
7/16	NL11ss	14	28	4553	30	4553
1/2	NL1/2”ss	13	43	6072	46	6072
9/16	NL14ss	12	62	7781	66	7781
5/8	NL16ss	11	85	9663	90	9663
3/4	NL3/4”ss	10	103	9884	110	9884
7/8	NL22ss	9	165	13637	176	13637
1	NL1”ss	8	250	17886	266	17886
1 1/8	NL30ss	7	355	22542	377	22542
1 1/4	NL33ss	7	494	28587	526	28587
1 3/8	NL36ss	6	649	34089	691	34089
1 1/2	NL39ss	6	853	41441	909	41441

_{Cu/C paste = Copper/graphite paste (Molykote® 1000)
Oil = WD40 has been used.
G_F = Ratio of yield point. When tightening according to guidelines and with no deviation, this is the pre-stress achieved expressed as % of yield point.
μ_th = Thread friction coefficient
μ_h = Under head friction coefficient
1 lbf = 4.448 N
1 ft-lb = 1.356 Nm}

_{Thread friction coefficients have theoretical values but are verified through testing.
Under head friction coefficients have been established by tests.}

			316ss Cu/C paste, G_F = 65%		304ss Cu/C paste, G_F = 70%
Bolt Size	Product Name	Pitch [TPI]	Torque [ftlb]	Clamp Load [lb]	Torque [ftlb]	Clamp Load [lb]
#5	NL3ss-254	40	0.6	342	0.7	342
#6	NL3.5ss-254	32	0.8	392	0.9	392
#8	NL4ss-254	32	1.4	602	1.5	602
#10	NL5ss-254	24	2.1	756	2.3	756
1/4	NL1/4”ss-254	20	5.1	1368	5.3	1368
5/16	NL8ss-254	18	10.0	2249	11.0	2249
3/8	NL3/8”ss-254	16	18	3320	19	3320
7/16	NL11ss-254	14	28	4553	30	4553
1/2	NL1/2”ss-254	13	43	6072	46	6072
9/16	NL14ss-254	12	62	7781	66	7781
5/8	NL16ss-254	11	85	9663	90	9663
3/4	NL3/4”ss-254	10	103	9884	110	9884
7/8	NL22ss-254	9	165	13637	176	13637
1	NL1”ss-254	8	250	17886	266	17886
1 1/8	NL30ss-254	7	355	22542	377	22542
1 1/4	NL33ss-254	7	494	28587	526	28587
1 3/8	NL36ss-254	6	649	34089	691	34089
1 1/2	NL39ss-254	6	853	41441	909	41441

_{Cu/C paste = Copper/graphite paste (Molykote® 1000)
Oil = WD40 has been used.
G_F = Ratio of yield point. When tightening according to guidelines and with no deviation, this is the pre-stress achieved expressed as % of yield point.
μ_th = Thread friction coefficient
μ_h = Under head friction coefficient
1 lbf = 4.448 N
1 ft-lb = 1.356 Nm}

_{Thread friction coefficients have theoretical values but are verified through testing.
Under head friction coefficients have been established by tests.}

			Oil, G_F = 75% μ_th = 0.08, μ_h = 0.18		Cu/C paste, G_F = 75% μ_th = 0.08, μ_h = 0.19		Dry, G_F = 55% μ_th = 0.19, μ_h = 0.2
Bolt Size	Product Name	Pitch [TPI]	Torque [ftlb]	Clamp Load [lb]	Torque [ftlb]	Clamp Load [lb]	Torque [ftlb]	Clamp Load [lb]
5/16	NL8	18	18	3674	18	3674	18	2694
3/8	NL3/8"	16	31	5424	32	5424	31	3978
1/2	NL1/2"	13	75	9920	77	9920	76	7271
9/16	NL14	12	107	12712	111	12712	109	9322
5/8	NL16	11	148	15786	153	15786	151	11576
3/4	NL3/4"	10	258	23335	267	23335	266	17112

_{Cu/C paste = Copper/graphite paste (Molykote® 1000)
Oil = WD40 has been used.
G_F = Ratio of yield point. When tightening according to guidelines and with no deviation, this is the pre-stress achieved expressed as % of yield point.
μ_th = Thread friction coefficient
μ_h = Under head friction coefficient}

_{Thread friction coefficients have theoretical values but are verified through testing.
Under head friction coefficients have been established by tests.}

			Oil, G_F = 71% μ_th = 0.08, μ_h = 0.14		Cu/C paste, G_F = 75% μ_th = 0.07, μ_h = 0.15
Bolt Size	Product Name	Pitch [TPI]	Torque [ftlb]	Clamp Load [lb]	Torque [ftlb]	Clamp Load [lb]
5/16	NL8	18	20.0	4915	22	5192
3/8	NL3/8"	16	36	7256	38	7665
1/2	NL1/2"	13	86	13270	91	14017
9/16	NL14	12	123	16771	131	17963
5/8	NL16	11	170	21117	180	22307
3/4	NL3/4"	10	296	31214	315	32973

_{Cu/C paste = Copper/graphite paste (Molykote® 1000)
Oil = WD40 has been used.
G_F = Ratio of yield point. When tightening according to guidelines and with no deviation, this is the pre-stress achieved expressed as % of yield point.
μ_th = Thread friction coefficient
μ_h = Under head friction coefficient}

_{Thread friction coefficients have theoretical values but are verified through testing.
Under head friction coefficients have been established by tests.}

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