Appendix A • Torque Specifications
Torque Specifications (ft-lbs)
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Bolt | Markings |
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#10 | 1/4 | 5/16 | 3/8 | 7/16 | 1/2 | 9/16 | 5/8 | 3/4 | 7/8 | ||||||
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SAE Grade 2 |
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| - | 5 | 10 | 18 | 29 | 44 | 63 | 87 | 155 | 150* |
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SAE Grade 5 |
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| - | 8 | 16 | 28 | 44 | 68 | 98 | 135 | 240 | 387 |
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SAE Grade 5 |
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| - | - | 18 | - | - | - | - | - | - | - |
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SAE Grade 8 |
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| - | 11 | 22 | 39 | 63 | 96 | 138 | 191 | 338 | 546 |
Coarse (UNF) |
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Socket Head |
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Cap Screw |
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| 5 | 13 | 26 | 46 | 73 | 112 | 115 | 215 | 380 | 614 |
(ASTM A574) |
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Coarse (UNC) |
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1)Torque values in this table are not to override other specific torque specifications when supplied.
2)When using loctite, torque values in this table are only accurate if bolts are tightened immediately after loctite is applied.
*The proof strength of Grade 2 bolts is less for sizes 7/8 and above and therefore the torque values are less than smaller sizes of the same grade.
Torque Specifications for 17-4 Stainless Steel Fasteners (ft-lbs)
Type | Head |
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Bolt/Nut | Markings |
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| #10 | 1/4 | 5/16 | 3/8 | 7/16 | 1/2 | 9/16 | 5/8 | 3/4 | |
Hex & Socket | 3 | 8 | 14 | 25 | 40 | 60 | 101 | 137 | 245 | |
Head Cap Screws | ||||||||||
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Nut | - | 8 | - | 25 | - | - | - | - | - | |
NOTE: Continue use of red loctite #271 (VPN 2205E) on currently applied locations. Use blue loctite #243 (VPN 2205F or 2205G) on all remaining locations.
VSG/VSSG • Installation, Operation and Maintenance Manual •Vilter/Emerson • 35391SSG | A |
