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Torque Values for U.S. Customary Thread Fasteners With Lubricated
*
or Plated Threads
†
Thread
Diameter–
Pitch
Regular Hex Flanged
Grade 5
Bolt
Grade 5 or
BNut
Grade 8 or
8.2 Bolt
Grade 8 or
CNut
Grade 5
Bolt
Grade B
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) Torque: lbf·ft (N·m)
f230002
f230003
f230004
f230005
f230006
f230007
f230008
f230009
1/4–20 7 (9) 8 (11) 6 (8) 10 (14)
1/4–28 8 (11) 9 (12) 7 (9) 12 (16)
5/16–18 15 (20) 16 (22) 13 (18) 21 (28)
5/16–24 16 (22) 17 (23) 14 (19) 23 (31)
3/8–16 26 (35) 28 (38) 23 (31) 37 (50)
3/8–24 30 (41) 32 (43) 25 (34) 42 (57)
7/16–14 42 (57) 45 (61) 35 (47) 60 (81)
7/16–20 47 (64) 50 (68) 40 (54) 66 (89)
1/2–13 64 (87) 68 (92) 55 (75) 91 (123)
1/2–20 72 (98) 77 (104) 65 (88) 102 (138)
9/16–12 92 (125) 98 (133) 80 (108) 130 (176)
9/16–18 103 (140) 110 (149) 90 (122) 146 (198)
5/8–11 128 (173) 136 (184) 110 (149) 180 (244)
5/8–18 145 (197) 154 (209) 130 (176) 204 (277)
3/4–10 226 (306) 241 (327) 200 (271) 320 (434)
3/4–16 253 (343) 269 (365) 220 (298) 357 (484)
7/8–9 365 (495) 388 (526) 320 (434) 515 (698)
7/8–14 402 (545) 427 (579) 350 (475) 568 (770)
1–8 — 582 (789) — —
1–12 — 637 (863) — —
1–14 — 652 (884) — —
*
Sterling recommends that all plated and unplated fasteners be coated with oil before installation.
†
Use these torque values if either the bolt or nut is lubricated or plated (zinc-phosphate conversion-coated, cadmium-plated, or waxed).
Table 1, Torque Values for U.S. Customary Thread Fasteners With Lubricated or Plated Threads
General Information 00
Torque Specifications Tables: 00–03
Acterra Maintenance Manual, January 2007 00/3