Value Collection 365-3166 Hex Rethreading Die 3-1/4-12

Product Description

The VALUE COLLECTION 365-3166 is a hex rethreading die designed to restore damaged or corroded external threads on fasteners and threaded rod. Sized for 3-1/4-12 thread form to the UNS standard with a right-hand thread direction, this die fits a 5-inch hex holder and is machined from carbon steel for reliable cutting performance. It is used by maintenance machinists, pipefitters, and industrial mechanics who need to clean up threads on large-diameter fasteners without full replacement. The carbon steel construction provides sufficient hardness for rethreading mild steel and similar materials in the field or shop.

This rethreading die is suited for industrial maintenance and repair applications involving large-diameter threaded components. Typical use cases include restoring threads on heavy equipment fasteners, structural bolts, and large pipe fittings where thread damage has occurred from corrosion, impact, or handling. The 3-1/4-12 UNS thread specification is common in heavy industrial and mechanical assembly contexts. This die is intended for shop or field use by experienced machinists or trade professionals working with oversize threaded components.

Key Features

• 3-1/4-12 UNS thread specification for large-diameter rethreading applications
• Right-hand thread direction matches standard fastener orientation
• 5-inch hex size for secure engagement with compatible die stocks or holders
• Carbon steel construction provides adequate hardness for rethreading mild steel fasteners
• Single-piece die format for straightforward field or bench use

Compatibility

Designed for use with 5-inch hex die stocks and holders compatible with the 3-1/4-12 UNS right-hand thread specification. Verify holder hex size and thread form before installation.

Installation Notes

Installation and use of rethreading dies should be performed by qualified machinists or trade professionals familiar with threading tools and procedures. Ensure the workpiece is securely clamped or fixtured before applying the die to prevent movement during threading. Apply appropriate cutting fluid to the die and workpiece to reduce heat and extend tool life. Do not force the die if resistance is excessive, as this can damage the die or the workpiece threads.