1.21
Section 1
Safety and General Information
1
English Fastener Torque Recommendations for Standard Applications
Grade 2 or 5
Fasteners Into
Aluminum
Size
8-32 2.3 (20) 2.8 (25) --------- 2.3 (20)
10-24 3.6 (32) 4.5 (40) --------- 3.6 (32)
10-32 3.6 (32) 4.5 (40) --------- ---------
1/4-20 7.9 (70) 13.0 (115) 18.7 (165) 7.9 (70)
1/4-28 9.6 (85) 15.8 (140) 22.6 (200) ---------
5/16-18 17.0 (150) 28.3 (250) 39.6 (350) 17.0 (150)
5/16-24 18.7 (165) 30.5 (270) --------- ---------
3/8-16 29.4 (260) --------- --------- ---------
3/8-24 33.9 (300) --------- --------- ---------
Size
5/16-24 --------- ---------- 40.7 (30) ---------
3/8-16 --------- 47.5 (35) 67.8 (50) ---------
3/8-24 --------- 54.2 (40) 81.4 (60) ---------
7/16-14 47.5 (35) 74.6 (55) 108.5 (80) ---------
7/16-20 61.0 (45) 101.7 (75) 142.4 (105) ---------
1/2-13 67.8 (50) 108.5 (80) 155.9 (115) ---------
1/2-20 94.9 (70) 142.4 (105) 223.7 (165) ---------
9/16-12 101.7 (75) 169.5 (125) 237.3 (175) ---------
9/16-18 135.6 (100) 223.7 (165) 311.9 (230) ---------
5/8-11 149.2 (110) 244.1 (180) 352.6 (260) ---------
5/8-18 189.8 (140) 311.9 (230) 447.5 (330) ---------
3/4-10 199.3 (150) 332.2 (245) 474.6 (350) ---------
3/4-16 271.2 (200) 440.7 (325) 637.3 (470) ---------
Tightening Torque: N·m (ft. lb.) + or - 20%
Tightening Torque: N·m (in. lb.) + or - 20%
Grade 2 Grade 5 Grade 8
Bolts, Screws, Nuts and Fasteners
Assembled Into Cast Iron or Steel
N·m = in. lb. x 0.113
N·m = . lb. x 1.356
in. lb. = N·m x 8.85
. lb. = N·m x 0.737
Torque
Conversions
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