TM-9-2320-285-24-2

TRUCK TRACTOR, YARD TYPE, 43,500 LB GVW, DED, 4X2, ARMY MODEL M878A1

TECHNICAL MANUAL; ORGANIZATIONAL, DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE MANUAL

OCTOBER 1985

TM-9-2320-285-24-2 - Page 673 of 698

TM 9-2320-285-24-2

Table D-3.

Locknut Breakaway Torque Values

MINIMUM BREAK-

THREAD

AWAY TORQUE

SIZE

(POUNDS INCH)

10-32

2.0

1l4-28

3.5

5/16-24

6.5

3/8-24

9.5

7/16-20

14.0

1/2-20

18.0

9/16-18

24.0

5/8-18

32.0

3/4-16

50.0

7/8-14

70.0

1-12

90.0

1-1/8-12

117.0

1-1/4-12

143.0

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.

D-4