TM 5-4520-253-13
A P P E N D I X G
TORQUE LIMITS
Section I. INTRODUCTION
G - 1 . S C O PE
This appendix lists standard torque values for self-locking nuts.
Special torque values and sequences
are indicated in the maintenance procedures for applicable components.
G-2. EXPLANATION OF LISTING
The listing relates thread size to minimum breakaway torque in inch pounds.
G - 3 . P R O C E D U RE
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.
Section Il. SELF-LOCKING NUT BREAKAWAY TORQUE VALUES
Minimum Breakaway
Minimum Breakaway
Thread Size
Torque (In. Lb)
Thread Size
Torque (In. Lb)
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
318-24
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
G-1/( G-2 blank)
