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The CENTURY DRILL TOOL CO INC 73203 is a No. 3 square flute screw extractor designed to remove broken bolts, screws, and pipe fittings from fastening holes without damaging the surrounding material. It removes bolts or screws sized at 7/16 inches and pipe sized at 1/8 inches. The square flute design is engineered for thin-wall extractions, gripping the broken fastener as it turns without spreading or cracking the wall of the hole. A 15/64-inch left-hand cobalt drill bit is recommended for the pilot hole. This tool is used by plumbers, HVAC technicians, electricians, and general trade professionals whenever a fastener breaks flush or below the surface of a workpiece.
The 73203 is suited for service and repair work across residential and commercial applications where broken fasteners are common — including pipe fittings, equipment housings, junction boxes, and mechanical assemblies. Its compact design makes it practical for tight-access areas. The left-hand drill bit recommendation means the pilot drilling action itself may back out the broken fastener before extraction is even needed, saving time on the job.
Designed for use on broken bolts or screws at 7/16 inches and broken pipe fittings at 1/8 inches; fits standard tap wrench or extraction handle sized for a No. 3 extractor.
Installation is performed by trade professionals or experienced DIYers using a tap wrench or T-handle. Before extraction, ensure the workpiece is secured and the area is de-energized or depressurized as required by the application. Drill the pilot hole to 15/64 inches using a left-hand cobalt bit — left-hand rotation during drilling may remove the fastener without needing the extractor. Insert the extractor into the pilot hole and turn counterclockwise with steady, controlled pressure to avoid snapping the extractor in the hole.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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