Irwin Hanson 7248ZR Hex Rethreading Die 9/16-12 Unc

Product Description

The IRWIN HANSON 7248ZR is a hex rethreading die designed to restore damaged or corroded external threads without removing the fastener or fitting from service. Built from carbon steel, this die runs a 9/16-12 UNC thread profile in a right-hand direction, making it a practical tool for cleaning up bolts, studs, and threaded rod on the bench or in the field. Its hex body allows a standard wrench or ratchet to drive it, reducing the need for a dedicated die stock handle. Plumbers, pipefitters, HVAC technicians, electricians, and general maintenance trades keep rethreading dies like this in their service kits for fast thread repair on fasteners and fittings.

This die is suited for use on 9/16-12 UNC threaded fasteners commonly found in mechanical equipment, pipe flanges, structural connections, and HVAC equipment frames. It is intended for rethreading and chasing existing threads rather than cutting new threads from blank stock. The compact hex form factor makes it useful in tight spaces where a full die stock would not fit, a common scenario during equipment service and repair in commercial and residential mechanical systems.

Key Features

• 9/16-12 UNC thread size for right-hand external thread repair
• Carbon steel construction provides adequate hardness for rethreading mild steel and iron fasteners
• Hex body design accepts standard wrenches and ratchets - no die stock required
• Right-hand thread direction matches the vast majority of standard fastener applications
• Compact form factor suits field service and confined-space repair work

Compatibility

Designed for rethreading and chasing right-hand 9/16-12 UNC external threads on bolts, studs, and threaded rod in general mechanical, HVAC, plumbing, and electrical trade applications.

Installation Notes

Rethreading dies are typically used by hand or with a wrench - apply cutting oil or thread lubricant to the damaged fastener before running the die to reduce heat and extend tool life. Start the die squarely on the thread axis to avoid cross-threading. Do not use this die to cut new threads from unthreaded stock, as it is not designed for that application. No special certifications or code compliance applies to the use of a rethreading die, but standard lockout/tagout procedures should be followed before rethreading fasteners on energized or pressurized equipment.