TM 9-243
TYPES AND USES - Continued
ADJUSTABLE OPEN-END WRENCH
MONKEY AND AUTO WRENCHES
The adjustable open-end wrench has one fixed jaw and
a movable or adjustable jaw. The adjustable jaw is set
against the face of the nut by turning a knurled worm
gear. Care must be exercised when using an adjustable
wrench. Always use the fixed jaw for applying pressure
to tighten or loosen nuts or bolts. Adjustable wrenches
are used to remove and/or install nuts, bolts, and studs
when the correct size wrench or socket is not available.
CLAMP PLIERS
The clamp pliers are generally used more as a wrench
than as a pair of pliers. It has a fixed jaw and handle
which contains an adjustment screw for the movable
jaw. The other handle is in two sections, one section to
apply pressure and to lock the pliers, and the other
section, when pulled, to release the grip. Clamp pliers
are used to hold or clamp nuts and bolts which have
been rounded off by using the wrong size wrench.
The monkey and auto wrenches are similar and have
one fixed jaw and an adjustable jaw which moves along
the handle by turning a knurled worm gear. Monkey and
auto wrenches are used to install or remove odd size
nuts and bolts. An adjustable wrench must be used with
care. Always apply pressure against the fixed jaw.
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