TM 10-4610-244-13
TM 09476B-13/1
Table H-1.
General Torque Requirements (Cont'd).
Bolt/Screw Size
Torque Requirement in ft lb (N. m)
SAE Grade
SAE Grade
SAE Grade
SAE Grade
1 or 2
5
6 or 7
8
1-8 UNC
235 (319)
590 (800)
660 (895)
910 (1234)
1-14 UNF
250 (339)
660 (895)
82 (1119)
990 (1342)
1-1/8-7 UNC
350) (475)
800 (185)
1000 (1356)
1280 (1736)
1-1/8-12 UNF
400 (542)
881 (1193)
1050 (1424)
1440 (1953)
1-1/4-7 UNC
500 (678)
1080 (1404)
1325 (1797)
1820 (2468)
1-1/4-12 LUNF
550 (746)
1125( 1526)
1325 (1797)
1820 (2712)
1-3/8-6 UNC
660 (895)
1460 (1980)
1800 (2441)
2380 (3227)
1-3/8-12 UNF
740 (1003)
1680 (2278)
1960 (2658)
2720 (3688 0
1-1/2-6 UNC
870 (118))
1940 (2031)
2913 (3950)
3160 (4285
1-1/2-12 UNF
98() (1329)
2200 (2983)
3000 (4068)
3560 (4827)
Table H-2.
Locknut Breakaway Torque Values.
NOTE
To determine breakaway torque, thread locknut onto screw or bolt until at least two threads stick
out Locknut shall not make contact with a mating part. Stop the locknut. Torque necessary to
begin turning locknut again is the breakaway torque Do not reuse locknuts that do not meet
min1iLmum breakaway torque
THREAD
MINIMUM BREAKAWAY TORQUE
SIZE
in-lb (N m)
10-32
2 0 (0.23)
1/4-28
3 5 (0. 40)
5/1 6-24
6.5(0.73)
3/8-24
9 5 (1.07)
7/ 16-20
14.0 (1.58)
1/2-20
18.0 (2.03)
9/16-18
24.0 (2.71)
5/8-18
32 0 (3.62)
3 4-16
50.0 (5.65)
7/8-14
70 0 (7.91)
1-12
90.0 (10.17)
1-1/8-12
117.0 (13 22)
H-2
