Section 6 - Specifications
Hardware Torque Values - Inch
Minimum hardware tightening torques
In foot pounds
Inch hardware and locknuts
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| SAE Grade 5 |
| SAE Grade 8 |
| Locknuts |
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Nominal | Unplated | Plated | Unplated |
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Size |
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Plated | Plated | W/zncr | Plated | W/zncr | GR5 Bolts | GR5 Bolts | |||||||||||
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| Silver | Silver |
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1/4 | 55* (6..2) | 7..2* (8.1) | 86* (9..7) | 112* (13) | 121* (14) | 157* (18) | 61* (6..9) | 86* (9..8) | |||||||||
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5/16 | 115* (13) | 149* (17) | 178* (20) | 229* (26) | 250* (28) | 324* (37) | 125* (14) | 176* (20) | |||||||||
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3/8 | 17 | (23) | 22 | (30) | 26 | (35) | 34 | (46) | 37 | (50) | 48 | (65) | 19 | (26) | 26 | (35) | |
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7/16 | 27 | (37) | 35 | (47) | 42 | (57) | 54 | (73) | 59 | (80) | 77 (104) | 30 | (41) | 42 | (57) | ||
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1/2 | 42 | (57) | 54 | (73) | 64 | (87) | 83 (113) | 91 (123) | 117 | (159) | 45 | (61) | 64 | (88) | |||
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9/16 | 60 | (81) | 77 (104) | 92 (125) | 120 | (163) | 130 | (176) | 169 | (229) | 65 | (88) | 92 (125) | ||||
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5/8 | 83 (112) | 107 | (145) | 128 | (174) | 165 | (224) | 180 | (244) | 233 | (316) | 90 (122) | 127 | (172) | |||
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3/4 | 140 | (198) | 189 | (256) | 226 | (306) | 293 | (397) | 319 | (432) | 413 | (560) | 160 | (217) | 226 | (306) | |
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7/8 | 142 | (193) | 183 | (248) | 365 | (495) | 473 | (641) | 515 | (698) | 667 (0904) | 258 | (350) | 364 | (494) | ||
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1 | 213 | (289) | 275 | (373) | 547 | (742) | 708 | (960) | 773 (1048) | 1000 (1356) | 386 | (523) | 545 | (739) | |||
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NOTE: Torque values shown with * are inch pounds..
Identification of Hex Cap Screws and Carriage Bolts
Grade 2 SAE | Grade 5 SAE | Grade 8 SAE | Regular Nuts | SAE Grade 5 | SAE Grade 6 |
Bolts | Bolts | Bolts |
| Hex Nuts | Hex Nuts |
Locknuts
B
Grade Identification | Grade Identification | Grade Identification |
Grade A: No Notches | Grade A: No Mark | Grade A: No Marks |
Grade B: One Circumferential Notch | Grade B: Letter B | Grade B: Three Marks |
Grade C: Two Circumferential Notches | Grade C: Letter C | Grade C: Six Marks |
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| Marks need not be located ta corners |
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