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TM 10-5430-236-12&P
0036 00
0036 00-2
Table 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 breakaway torque. Do not reuse
locknuts that do not meet minimum breakaway torque.
Thread
Size
Minimum Breakaway
lb-in.
Torque
(Nm)
10-32
2.0
(0.23)
1/4-28
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)
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)
SEQUENCING
Torque values are established using the bolt pattern sequence below:
For 8 Hole Pattern
For 12 Hole Pattern
For 20 Hole Pattern
END OF WORK PACKAGE
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