- SAE Hex Clamp Bolt Chart -
Suggested Torque (ft/lbs)*

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Bolt Size

Grade 2

Grade 3

Grade 5

Grade 6

Grade 8

1/4" -20 5 7 9 10 12
5/16" - 18 12 13 15 22 25
3/8" - 16 20 22 25 30 37
7/16" - 14 30 35 40 50 60
1/2" - 13 42 50 60 80 92
9/16" - 12 55 72 88 114 132
5/8" - 11 88 96 120 164 180
3/4" - 10 130 196 215 266 345
7/8" - 9 190 276 320 456 490
1" - 8 312 405 466 655 725

* Your use of this information acknowledges your total acceptance of responsibility for results. Values may change if lubricants are used.

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