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TM10-4320-316-14
APPENDIX G
TORQUE LIMITS
G-1. GENERAL. This appendix provides general torque limits for fasteners. Special torque values are indicated in the
maintenance procedures for applicable components. The general torque values given in this appendix shall be used
when specific torque values are not indicated in the maintenance procedures.
G-2. TORQUE LIMITS. Torque limits are listed in Table G-1 for fasteners. Dry fasteners are defined as fasteners on
which no lubricants are applied to the threads. Wet fasteners are defined as fasteners on which graphite or
molydisulphide greases or other extreme pressure lubricants are applied to the threads. Table G-2 lists the minimum
breakaway torque values for locknuts.
Table G-1. General Torque Requirements for Dry Fasteners.*
Torque Requirement in lb ft (Nm)
Bolt/Screw
SAE Grade
SAE Grade
SAE Grade
SAE Grade
Size
1 or 2
5
6 or 7
8
1/4-20 UNC
5 (7)
8 (11)
10 (14)
12 (16)
1/4-28 UNF
6 (8)
10 (14)
12 (16)
14 (19)
5/16 18 UNC
11 (15)
17 (23)
19 (26)
24 (33)
5/16-24 UNF
13 (18)
19 (26)
23 (31)
27 (37)
3/8 16 UNC
18 (24)
31 (42)
34 (46)
44 (60)
3/8-24 UNF
20 (27)
35 (47)
42 (57)
49 (66)
7/16-14 UNC
28 (38)
49 (66)
55 (75)
70 (95)
7/16-20 UNF
30 (41)
55 (75)
67 (91)
78 (106)
1/2-13 UNC
39 (53)
75 (102)
85 (115)
105 (142)
1/2-20 UNF
41 (56)
85 (115)
102 (138)
120 (163)
9/16-12 UNC
51 (69)
110 (149)
120 (163)
155 (210)
9/16-18 UNF
55 (75)
120 (163)
145 (197)
170 (231)
5/8-11 UNC
63 (85)
150 (203)
167 (226)
210 (285)
5/8-18 UNF
95 (129)
170 (231)
205 (278)
240 (325)
3/4-10 UNC
105 (142)
270 (366)
280 (380)
375 (509)
3/4-16 UNF
115 (156)
295 (400)
357 (484)
420 (570)
7/8-9 UNC
160 (217)
395 (536)
440 (597)
605 (820)
7/8-14 UNF
175 (237)
435 (590)
555 (753)
675 (915)
G-1
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