Torque Settings for Steel Fasteners

Grade "A"
Diameter of thread	BSW	BSF	UNC	UNF
1/4"	3.6	4	3.6	4
5/16"	7.4	7.9	7.4	8.2
3/8"	13	14	13	15
7/16"	21	23	21	23
1/2"	31	34	32	36
9/16"	46	50	46	52
5/8"	64	66	64	72
3/4"	113	118	114	126
7/8"	181	191	183	201
1"	272	288	274	299
1 1/8"	367	411	389	434
All measurements are in ft-lbs
To convert to Nm multiply by 0.1386

Grade "P"
Diameter of thread	BSW	BSF	UNC	UNF
1/4"	5.3	5.9	5.3	6
5/16"	11	12	11	12
3/8"	19	21	19	22
7/16"	31	33	31	34
1/2"	46	50	47	53
9/16"	68	73	68	76
5/8"	93	100	94	106
3/4"	166	173	167	185
7/8"	266	280	269	295
1"	400	422	402	438
1 1/8"	567	602	570	637
All measurements are in ft-lbs
To convert to Nm multiply by 0.1386

Grade "R"
Diameter of thread	BSW	BSF	UNC	UNF
1/4"	8.2	9.1	8.2	9.3
5/16"	17	18	17	19
3/8"	30	32	30	34
7/16"	48	51	48	53
1/2"	70	77	73	82
9/16"	104	113	105	117
5/8"	144	154	145	164
3/4"	256	268	256	286
7/8"	411	433	415	456
1"	617	652	621	678
1 1/8"	876	931	881	964
All measurements are in ft-lbs
To convert to Nm multiply by 0.1386

Grade "S"
Diameter of thread	BSW	BSF	UNC	UNF
1/4"	9.1	9.1	10	10
5/16"	19	19	20	21
3/8"	33	33	36	36
7/16"	53	53	58	60
1/2"	79	82	85	91
9/16"	117	117	126	131
5/8"	161	162	172	183
3/4"	286	288	300	319
7/8"	460	464	464	510
1"	690	695	729	757
1 1/8"	979	985	1041	1100
All measurements are in ft-lbs
To convert to Nm multiply by 0.1386

Grade "T"
Diameter of thread	BSW	BSF	UNC	UNF
1/4"	11	12	11	12
5/16"	22	23	22	24
3/8"	38	41	39	44
7/16"	62	67	62	69
1/2"	91	100	94	106
9/16"	135	146	137	152
5/8"	187	200	188	212
3/4"	331	347	333	370
7/8"	532	580	537	590
1"	799	844	804	877
1 1/8"	1134	1205	1140	1273
All measurements are in ft-lbs
To convert to Nm multiply by 0.1386

Grade "X"
Diameter of thread	BSW	BSF	UNC	UNF
1/4"	15	17	15	17
5/16"	31	33	31	34
3/8"	55	59	55	63
7/16"	88	95	89	99
1/2"	130	143	135	152
9/16"	194	210	195	217
5/8"	267	286	269	304
3/4"	474	497	477	529
7/8"	762	802	769	845
1"	1144	1208	1152	1255
1 1/8"	1624	1725	1632	1823
All measurements are in ft-lbs
To convert to Nm multiply by 0.1386

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