TM 5-4310-387-14
Table F-2. Self-Locking Nut Breakaway Torque Values.
Minimum Breakaway
Minimum Breakaway
Thread Size
Torque (In.-Lbs.)
Thread Size
Torque (In.-Lbs.)
10-32
2.0
5/8 - 18
32.0
1/4-28
3 5
3/4-16
50.0
5/16-24
6.5
7/8-14
70.0
3/8-24
9.5
1-12
90.0
7/16-20
14.0
1-1/8-12
117.0
1/2-20
18.0
1-1/4-12
143.0
9/16-18
24.0
NOTE
To determine breakaway torque, thread nut onto screw or bolt until at least
two threads stick out. Nut shall not make contact with a mating part. Stop the
nut. Torque necessary to begin turning nut again is the breakaway torque.
Do not reuse self-locking nuts that do not meet minimum breakaway torque.
F-2
