Section 1 Safety and General Information 1.15 1 Tightening Torque: N·m (in. lb.) + or - 20% Bolts, Screws, Nuts and Fasteners Assembled Into Cast Iron or Steel Grade 2 Grade 5 Grade 8 Grade 2 or 5 Fasteners Into Aluminum Size 8-32 10-24 10-32 1/4-20 1/4-28 5/16-18 5/16-24 3/8-16 3/8-24 2.3 (20) 3.6 (32) 3.6 (32) 7.9 (70) 9.6 (85) 17.0 (150) 18.7 (165) 29.4 (260) 33.9 (300) 2.8 (25) 4.5 (40) 4.5 (40) 13.0 (115) 15.8 (140) 28.3 (250) 30.5 (270) --------- --------- --------- --------- --------- 18.7 (165) 22.6 (200) 39.6 (350) --------- --------- --------- 2.3 (20) 3.6 (32) --------- 7.9 (70) --------- 17.0 (150) --------- --------- --------- Tightening Torque: N·m (ft.
lb.) + or - 20% Size 5/16-24 3/8-16 3/8-24 7/16-14 7/16-20 1/2-13 1/2-20 9/16-12 9/16-18 5/8-11 5/8-18 3/4-10 3/4-16 --------- --------- --------- 47.5 (35) 61.0 (45) 67.8 (50) 94.9 (70) 101.7 (75) 135.6 (100) 149.2 (110) 189.8 (140) 199.3 (150) 271.2 (200) ---------- 47.5 (35) 54.2 (40) 74.6 (55) 101.7 (75) 108.5 (80) 142.4 (105) 169.5 (125) 223.7 (165) 244.1 (180) 311.9 (230) 332.2 (245) 440.7 (325) 40.7 (30) 67.8 (50) 81.4 (60) 108.5 (80) 142.4 (105) 155.9 (115) 223.7 (165) 237.3 (175) 311.9 (230) 352.6 (260) 447.5 (330) 474.6 (350) 637.3 (470) --------- --------- --------- --------- --------- --------- --------- --------- --------- --------- --------- --------- ---------