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The VALUE COLLECTION 364-0393 is a hex rethreading die designed to restore damaged or corroded external metric threads without requiring full thread cutting from scratch. Built from carbon steel, this die handles M39x3 thread profiles and is suited for maintenance and repair work on large-diameter fasteners and threaded rod. At 1 inch thick, it provides enough engagement depth for stable, accurate thread restoration. The right-hand thread direction matches standard metric fastener configurations. Plumbers, pipefitters, millwrights, and general maintenance technicians reach for this type of die when field-repaired threads need to pass inspection or accept a mating nut cleanly.
This rethreading die is appropriate for use in industrial maintenance, mechanical repair shops, and heavy-trade field service. It is suited to applications involving large structural fasteners, heavy equipment, or threaded components in plumbing and mechanical systems where M39 thread sizes appear. The metric fine thread standard makes it relevant for imported equipment and precision mechanical assemblies that use fine-pitch fasteners. It is a bench or field tool used individually or as part of a rethreading die set.
Designed for use on M39x3 right-hand metric fine threaded fasteners and threaded rod. Fits standard hex die stocks and rethreading die holders sized for this die body.
Rethreading dies are used by machinists, millwrights, and trade technicians. Secure the workpiece in a vise before applying the die to prevent movement during threading. Apply cutting oil to the die and workpiece to reduce friction and extend tool life. Follow standard shop safety practices including eye protection when working with cutting tools.
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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