|
| |
TM 10-4320-347-13&P
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 GC1 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 Requirements in lb ft (N.m)
Bolt/Screw
Size
SAE Grade
1 or2
SAE Grade
5
SAE Grade
6or7
SAE Grade
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)
5/16-24UNF
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)
9/16-12UNC
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)
3/4-1O 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
|
