This page was last updated on $Date: 2003/07/22 02:36:23 $

Bolt Torque Info

torque and clamp loads for grade 5 and 8 fasteners.

size grade 5 grade 8
clamp (lbs) Torque (ft-lbs) clamp (lbs) Torque (ft-lbs)
dry oiled dry oiled
1/4-20 2000 8 6 2850 12 9
1/4-28 2300 10 7.5 3250 14 10
5/16-18 2250 17 13 4700 25 18
5/16-24 3700 19 14 5200 25 20
3/8-16 4950 30 23 7000 45 35
3/8-24 5600 35 25 7900 50 35
7/16-14 6800 50 35 9550 70 55
7/16-20 7600 55 40 10650 80 60
1/2-13 9000 75 55 12750 110 80
1/2-20 10250 90 65 14375 120 90
9/16-12 11600 110 80 16375 150 110
9/16-18 13000 120 90 18250 170 130
5/8-11 14400 150 110 20350 220 170
5/8-18 16375 180 130 23000 240 180
3/4-10 21300 260 200 30100 380 280
3/4-16 23800 300 220 33500 420 320

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