Irwin Hanson 7273 Hex Rethreading Die 1-3/8-12 Unf

Product Description

The IRWIN HANSON 7273 is a hex rethreading die designed to restore damaged or corroded external threads on fasteners, bolts, and threaded rod. It cuts a 1-3/8-12 UNF (Unified National Fine) right-hand thread profile and measures 1 inch thick. The hex body allows a standard wrench or die stock to drive the tool without slipping. Made from carbon steel, it delivers the hardness needed to chase threads on common steel and iron fasteners. Machinists, pipefitters, maintenance mechanics, and industrial tradespeople reach for this die when a bolt thread is too far gone to chase with a nut alone.

This die is suited for maintenance and repair applications where external threads on inch-series fasteners have been damaged by corrosion, impact, or cross-threading. The 1-3/8-12 UNF thread size places it in industrial and heavy-equipment service work, where fine-thread fasteners appear on hydraulic fittings, machine tool components, and structural assemblies. It is a single-piece, bench or hand-held tool that works with a matching die stock or an adjustable wrench sized to the hex flats.

Key Features

• 1-3/8-12 UNF right-hand thread profile restores fine-pitch external threads
• 1 inch thickness provides adequate thread engagement depth for accurate chasing
• Hex body design accepts standard wrenches and die stocks for controlled torque application
• Carbon steel construction offers the hardness needed for rethreading steel and iron fasteners
• Right-hand thread direction matches the standard orientation used on the vast majority of industrial fasteners

Compatibility

Designed as an OEM-style rethreading die for 1-3/8-12 UNF right-hand external threads on inch-series fasteners and threaded rod.

Installation Notes

This tool is typically used by machinists, mechanics, and maintenance tradespeople working on threaded fastener repair. Before use, secure the workpiece and apply a cutting or threading fluid to reduce friction and extend die life. Start the die squarely on the damaged thread to avoid cross-threading, and advance slowly using steady, even pressure. Follow applicable workplace safety practices and wear eye protection when chasing threads on powered or lathe-mounted setups.