Irwin 6529 Hex Rethreading Die 5/16-24 1 Inch Hex

Product Description

The IRWIN 6529 is a hex rethreading die designed to restore damaged or corroded external threads on fasteners and threaded rod. It cuts a 5/16-24 UNF right-hand thread profile and fits a 1-inch hex holder or wrench for manual operation. The die is machined from carbon steel, providing the hardness needed to cut through rust, burrs, and thread deformation on steel fasteners. This tool is used by plumbers, HVAC technicians, electricians, and general maintenance professionals whenever field-damaged threads need to be restored without replacing the fastener.

The 6529 is suited for light-to-medium rethreading work in residential and commercial maintenance settings. Typical applications include restoring threads on bolts, studs, and threaded pipe fittings where corrosion or impact has distorted the thread profile. The 5/16-24 UNF thread specification makes it appropriate for fine-thread fastener applications common in mechanical assemblies, HVAC equipment panels, and electrical enclosures.

Key Features

• 5/16-24 UNF right-hand thread profile for fine-thread fastener restoration
• 1-inch hex profile accepts standard hex die holders and adjustable wrenches
• Carbon steel construction provides hardness suitable for cutting corroded or burred threads
• Compact hex form factor allows use in confined spaces during field service
• Sold individually as a single-piece unit

Compatibility

Designed as an OEM-style rethreading die for use with standard 1-inch hex die holders and applicable hand tools wherever 5/16-24 UNF external thread restoration is required.

Installation Notes

A licensed technician or experienced tradesperson should confirm the fastener thread specification before use to avoid cross-threading or further damage. Power down or de-energize any equipment before accessing threaded fasteners on live systems. Apply cutting oil or thread lubricant to the die and fastener to reduce friction and extend die life. Chase the thread slowly with steady, even pressure, backing off periodically to clear chips.