TM 9-243TYPES AND USES - ContinuedCROWFOOT WRENCHThe crowfoot wrench is an open-end wrench headwhich is turned with a socket handle. It is used to removeand/or install nuts or bolts. It is also used where anobstruction would prevent the use of a regular socket.PLUG WRENCHESThere are three basic types of plug wrenches, the bar-type, the multiple plug wrench, and the socket-type.Plug wrenches are used to remove and/or install drainplugs.Bar-type plug wrenches may be either square or hexa-gonal and are about two inches long. A combinationwrench or socket must be used to turn the plug.HEX KEY WRENCH (SHORTER SECTION)The multiple plug wrench combines several plug endson a common handle.The hex key wrench is an L-shaped, six-sided wrench.Both ends of the "L" are the same size so you can turnthe wrench either to gain access to the screw head or toobtain a leverage advantage. The hex key wrench isused to remove and/or install hex head screws.Socket-type plug wrenches are usually combined insets with an assortment of handles. The set will containseveral sizes.25-9
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