TM 9-243TYPES AND USES - ContinuedADJUSTABLE OPEN-END WRENCHMONKEY AND AUTO WRENCHESThe adjustable open-end wrench has one fixed jaw anda movable or adjustable jaw. The adjustable jaw is setagainst the face of the nut by turning a knurled wormgear. Care must be exercised when using an adjustablewrench. Always use the fixed jaw for applying pressureto tighten or loosen nuts or bolts. Adjustable wrenchesare used to remove and/or install nuts, bolts, and studswhen the correct size wrench or socket is not available.CLAMP PLIERSThe clamp pliers are generally used more as a wrenchthan as a pair of pliers. It has a fixed jaw and handlewhich contains an adjustment screw for the movablejaw. The other handle is in two sections, one section toapply pressure and to lock the pliers, and the othersection, when pulled, to release the grip. Clamp pliersare used to hold or clamp nuts and bolts which havebeen rounded off by using the wrong size wrench.The monkey and auto wrenches are similar and haveone fixed jaw and an adjustable jaw which moves alongthe handle by turning a knurled worm gear. Monkey andauto wrenches are used to install or remove odd sizenuts and bolts. An adjustable wrench must be used withcare. Always apply pressure against the fixed jaw.25-10
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