TM 10-4610-246-13
Table G-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 minimum breakaway
torque.
THREAD SIZE
MINIMUM BREAKAWAY TORQUE
in-lb (N-m)
10-32
2.0 (0.23)
¼-28
3.5 (0.40)
5/16-24
6.5 (0.73
3/8-24
9.5 (1.07)
7/16-20
14.0 (1.58)
½-20
18.0 (2.03)
9/16-18
24.0 (2.71)
5/8-18
32.0 (3.62)
¾-16
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)
G-2
