Irwin Hanson 7229 Hex Rethreading Die 5/16-24 Unf

Product Description

The IRWIN HANSON 7229 is a hex rethreading die used to restore damaged or corroded external threads on bolts, studs, and threaded rod. It cuts a 5/16-24 Unified Fine (UNF) thread profile in a right-hand direction using carbon steel construction. The hex body allows a standard wrench or die stock to apply controlled torque for accurate thread restoration without the need for a lathe or specialized machinery. Plumbers, electricians, HVAC technicians, and general maintenance mechanics reach for rethreading dies when a fastener has sustained thread damage from corrosion, impact, or cross-threading and replacement is not practical.

This die is suited for field repair and shop use across residential, commercial, and light industrial applications. It is appropriate wherever 5/16-24 UNF fasteners are used, including mechanical assemblies, HVAC equipment panels, electrical enclosures, and plumbing fixture hardware. The right-hand thread direction matches the standard orientation used on the vast majority of threaded fasteners in North American trade work.

Key Features

• 5/16-24 UNF right-hand thread profile for restoring standard fine-pitch external threads
• Carbon steel construction provides hardness suitable for cutting and chasing threads on common fastener materials
• Hex body design accepts a standard open-end wrench or adjustable wrench for controlled torque application
• Compact single-piece construction - no assembly required before use
• Lightweight at 0.06 pounds, making it practical for a field tool kit

Compatibility

Designed for use on 5/16-24 UNF right-hand external threads. Suitable for rethreading bolts, studs, and threaded rod conforming to the Unified Fine thread standard at this pitch.

Installation Notes

Rethreading dies are typically used by maintenance technicians and trade professionals performing in-place fastener repair. Before use, de-energize or shut down any equipment containing the fastener being serviced per applicable lockout/tagout procedures. Apply a cutting oil or thread lubricant to the die and fastener to reduce friction and improve thread quality during the chasing operation. Start the die straight onto the damaged thread to avoid introducing a new cross-thread condition.