TM 55-1730-229-12
AG 320AO-OMM-000
TO 35C2-3-473-1
TM 1730-12/1
When tightening self-locking
(5)
castellated nuts MS21224, MS17825, and
Do not apply antiseize compound to
MS17826, first tighten to minimum torque. If
bolt or nut threads.
slot in nut is aligned with cotter pin hole in
bolt, tighten nut an additional 60 degrees (one
Apply a coating of antiseize com-
(6)
castellation) and install cotter pin. If slot in
pound (E75) or equivalent to the bushing OD
nut is not aligned with cotter pin hole in bolt,
on bolts 114R3650 series only.
tighten nut until aligned and install cotter pin.
In either case, maximum torque must not be
exceeded.
Friction Torque in Inch-Pounds for Threaded Fortenors
MINIMUM
THREAD SIZE
FRICTION TORQUE
8-32
1.5
10-32
2.0
1/4-28
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 friction torque, thread the nut onto the screw or bolt
until at least two threads protrude. The nut shall not make contact
with a mating part. Stop the nut. The torque necessary to begin
turning the nut again is the breakaway torque. Do not reuse self-
locking nuts that do not meet minimum friction torque.
TORQUE
WRENCHES
5 to 50 Inch-Pounds
30 to 150 Inch-Pounds
