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Size Recommended Torque
Grade 5 Grade 8
Coarse Fine Coarse Fine
1/4" 6.3 7.3 9 10
5/16" 13 14 18 20
3/8" 23 26 33 37
7/16" 37 41 52 58
1/2" 57 64 80 90
9/16" 82 91 115 129
5/8" 112 128 159 180
3/4" 200 223 282 315
7/8" 322 355 454 501
1" 483 541 682 764
* Sizes from 1/4" up are in lb-ft.
† Fine thread figures are for 1"-14.
Values are for slightly lubricated bolts.

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