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Technical Data
Imperial Torque Chart
SAE GRADE 5
Coarse Thread, Zinc-Plated
SAE GRADE 8
Coarse Thread, Zinc-Plated
SIZE
TORQUE
SIZE
TORQUE
ft. lbs.
Nm
ft. lbs.
Nm
1/4 - 20 (.250)
6
8
1/4 - 20 (.250)
9
12
5/16 - 18 (.3125)
13
18
5/16 - 18 (.3125)
18
24
3/8 - 16 (.375)
23
31
3/8 - 16 (.375)
33
45
7/16 - 14 (.4375)
37
50
7/16 - 14 (.4375)
52
70
1/2 - 13 (.500)
57
77
1/2 - 13 (.500)
80
108
9/16 - 12 (.5625)
82
111
9/16 - 12 (.5625)
115
156
5/8 - 11 (.625)
112
152
5/8 - 11 (.625)
159
215
3/4 - 10 (.750)
200
271
3/4 - 10 (.750)
282
382
7/8 - 9 (.875)
322
436.5
7/8 - 9 (.875)
454
615
1 - 8 (1.000)
483
655
1 - 8 (1.000)
682
925
SAE GRADE 5
Fine Thread, Zinc-Plated
SAE GRADE 8
Fine Thread, Zinc-Plated
SIZE
TORQUE
SIZE
TORQUE
ft. lbs.
Nm
ft. lbs.
Nm
1/4 - 28 (.250)
7
10
1/4 - 28 (.250)
10
14
5/16 - 24 (.3125)
14
19
5/16 - 24 (.3125)
20
27
3/8 - 24 (.375)
26
35
3/8 - 24 (.375)
37
50
7/16 - 20 (.4375)
41
56
7/16 - 20 (.4375)
58
79
1/2 - 20 (.500)
64
87
1/2 - 20 (.500)
90
122
9/16 - 18 (.5625)
91
123
9/16 - 18 (.5625)
129
175
5/8 - 18 (.625)
128
173
5/8 - 18 (.625)
180
244
3/4 - 16 (.750)
223
302
3/4 - 16 (.750)
315
427
7/8 - 14 (.875)
355
481
7/8 - 9 (.875)
501
679
1 - 12 (1.000)
529
717
1 - 12 (1.000)
746
1011
1 -14 (1.000)
541
733
1 -14 (1.000)
764
1036
t-chrt_i.doc