TM 9-2320-279-34-3
APPENDIX D
TORQUE LIMITS
D-1. GENERAL. This section provides general torque limits for screws used on the M977 series
vehicles. Special torque limits are indicated in the maintenance procedures for applicable components. The
general torque limits given in this appendix shall be used when specific torque limits are not indicated in
the maintenance procedure. These general torque limits cannot be applied to screws that retain rubber
components. The rubber components will be damaged before the torque limit is reached. If a special torque
limit is not given in the maintenance instructions, tighten the screw or nut until it touches the metal
bracket then tighten it one more turn.
D-2. TORQUE LIMITS. Table D-1 lists dry torque limits. Dry torque limits are used on screws that do
not have lubricants applied to the threads. Table D-2 lists wet torque limits. Wet torque limits are used on
screws that have high pressure lubricants applied to the threads. Table D-3 lists torque limits for the M983
(HIAB) crane.
D-3. HOW TO USE TORQUE TABLE:
(1) Measure the diameter of
screw you are installing.
the
(2) Count the number of threads per
inch.
(3) Under the heading SIZE, look down the left hand
column until you find the diameter of the screw you
are installing (there will usually be two lines
beginning with the same size).
(4) In the second column under SIZE, find the number of
threads per inch that matches the number of threads
you counted in step (2). (Not required for metric
screws. )
CAPSCREW HEAD MARKINGS
(5) To find the grade screw you are installing, match the
markings on the head to the correct picture of
CAPSCREW HEAD MARKINGS on the torque table.
(6) Look down the column under the picture you found
in step (5) until you find the torque limit (in lb-ft or
N m) for the diameter and threads per inch of the
screw you are installing.
D-1
