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Page Title: Table 2. Locknut Breakaway Torque Values
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TM 10-5430-242-12&P 0043 00 0043 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 the breakaway torque.  Do not reuse locknuts that do not meet minimum breakaway torque. Thread   Minimum Breakaway Torque   Size lb-in.      (N·m) 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) END OF WORK PACKAGE

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