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Torque Values for U.S. Customary Thread Fasteners With Dry (Unlubricated)
*
Plain (Unplated) Threads
†
Thread
Diameter–Pitch
Regular Hex Flanged
Grade 5 Bolt
Grade5orB
Nut
Grade 8 or 8.2
Bolt
Grade8orC
Nut
Grade 8 or 8.2
Bolt
Grade G Nut
Torque: lbf·ft (N·m) Torque: lbf·ft (N·m) Torque: lbf·ft (N·m)
f230002
f230003
f230004
f230005
f230008
f230009
1/4–20 8 (11) 10 (14) —
1/4–28 9 (12) 12 (16) —
5/16–18 15 (20) 22 (30) 22 (30)
5/16–24 17 (23) 25 (34) —
3/8–16 28 (38) 40 (54) 40 (54)
3/8–24 31 (42) 45 (61) —
7/16–14 45 (61) 65 (88) 65 (88)
7/16–20 50 (68) 70 (95) —
1/2–13 70 (95) 95 (129) 95 (129)
1/2–20 75 (102) 110 (149) —
9/16–12 100 (136) 140 (190) 140 (190)
9/16–18 110 (149) 155 (210) —
5/8–11 135 (183) 190 (258) 190 (258)
5/8–18 155 (210) 215 (292) —
3/4–10 240 (325) 340 (461) 340 (461)
3/4–16 270 (366) 380 (515) —
7/8–9 385 (522) 540 (732) —
7/8–14 425 (576) 600 (813) —
1–8 580 (786) 820 (1112) —
1–12 635 (861) 900 (1220) —
1–14 650 (881) 915 (1241) —
*
Threads may have residual oil, but will be dry to the touch.
†
Male and female threads (bolt and nut) must both be unlubricated and unplated; if either is plated or lubricated, use Table 1. Sterling recommends that all
plated and unplated fasteners be coated with oil before installation.
Table 2, Torque Values for U.S. Customary Thread Fasteners With Dry (Unlubricated) Plain (Unplated) Threads
General Information00
Torque Specifications Tables: 00–03
Acterra Maintenance Manual, January 200700/4