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TM 11-5820-890-30-5
APPENDIX B
TORQUE REQUIREMENTS
B-1.
GENERAL INFORMATION.
Proper tightening of all threaded fasteners is an essential part of equipment maintenance. Not tightening enough
can allow:
Components to come loose.
Water, dirt, or other substances to enter unit.
Unwanted RF energy to enter and possibly damage unit.
RF energy to escape unit and possibly compromise security.
Trying to tighten a screw or nut too much can strip threads. Do not return equipments for use that have stripped
or missing screws or nuts.
B-2. TORQUE REQUIREMENTS.
Unless stated otherwise in an assembly procedure, all screws and nuts should be torqued as follows:
Metric Screw
(Thread) Size
Torque
(in-lb)
M2.2 X 0.45
M3.0 X 0.50
M4.0 X 0.70
Metric Nut
Size
M8.0 X 1.25
English
(Thread Diameter)
6
12
20
Torque
(in-lb)
30
Torque
(in-lb)
1/4
3/8
1/2
5/8
3/4
7/8
1-1/16
1-1/8
1-1/4
12
20
30
50
60
70
80
90
100
B-1/(B-2 blank)
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