TM 9-243TYPES AND USESSCREW EXTRACTORSScrew extractors are used to remove broken screwswithout damaging the threads or surrounding material.There are two basic types of screw extractors, thestraight-flute type and spiral-tapered type.The straight-flute type requires the following tools to drilla pilot hole in the screw: a twist drill (1), a drill guide (2),and a turn nut (3).The spiral-tapered type requires a twist drill for drilling apilot hole.TAP EXTRACTORThe tap extractor is usually of the flute type and requiresthe use of a wrench to turn the tap. It is used for remov-ing taps with no external area.24-2
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