TM 5-4320-300-14
APPENDIX F
TORQUE LIMITS
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-1/(F-2 blank)
