Value Collection 366-0162 Hex Rethreading Die 1/4-28 Lh Unf

Product Description

The VALUE COLLECTION 366-0162 is a hex rethreading die designed to restore damaged or corroded external threads to their original specification. Built from carbon steel, this die handles 1/4-28 UNF left-hand threads, making it the correct tool when working on fasteners and fittings that use a reverse-thread configuration to prevent loosening under rotation. Machinists, mechanics, and trade technicians use rethreading dies as a fast field repair option when replacing a threaded component is impractical. The hex body allows a standard die stock or wrench to apply consistent torque during the chasing operation.

This die is suited for maintenance and repair work in industrial, mechanical, and trade service settings where left-hand threaded fasteners appear on rotating assemblies, specialty fittings, or equipment designed to resist counter-rotation loosening. The 1/4-28 UNF pitch is a fine-thread designation common in precision mechanical assemblies. It is appropriate for bench work and in-the-field thread restoration on external threaded stock.

Key Features

• 1/4-28 UNF left-hand thread specification for reverse-thread fastener repair
• Carbon steel construction provides the hardness needed for thread chasing on common fastener materials
• Hex body design accepts standard die stocks and wrenches for controlled torque application
• Single-piece die format — no additional components required for operation
• Fine-thread (UNF) pitch suited for precision assemblies requiring close thread engagement

Compatibility

Designed as a rethreading die for 1/4-28 UNF left-hand external threads on bolts, studs, and threaded rod in mechanical and trade repair applications.

Installation Notes

Rethreading dies are used by machinists and trade technicians to restore damaged external threads; they are not for cutting new threads in hardened or specialty alloy stock. Secure the workpiece before beginning the chasing operation and apply appropriate cutting fluid to reduce heat and extend die life. Ensure the fastener or threaded component is fully de-energized, depressurized, and isolated from any load before performing thread restoration work. Inspect the restored thread with a matching nut or gauge after chasing to confirm full thread engagement before reassembly.