Value Collection 366-0282 Hex Rethreading Die 7/16-20 Lh

Product Description

The VALUE COLLECTION 366-0282 is a hex rethreading die designed to restore damaged or corroded external threads to their original specification. Built from carbon steel, it handles the mechanical demands of thread repair on fasteners, fittings, and threaded rod. This die cuts a 7/16-20 thread profile to the UNF (Unified National Fine) standard with a left-hand thread direction, making it the correct tool when right-hand dies will not serve. Machinists, maintenance technicians, and trade professionals use rethreading dies when a fastener or fitting thread is too damaged for a thread chaser alone but still salvageable without full replacement.

This die is suited for repair and maintenance work across mechanical, plumbing, and HVAC applications where left-hand threaded fasteners and fittings are present. Left-hand threads appear on specific valve stems, fan blade hubs, and equipment assemblies designed to resist loosening under rotational loads. The 7/16-20 UNF specification is common in precision mechanical assemblies and some fluid system fittings. The hex body allows a standard die stock or adjustable wrench to drive the die without slipping.

Key Features

• 7/16-20 UNF thread size for fine-pitch thread repair
• Left-hand thread direction for components that require reverse threading
• Carbon steel construction for durability in production and maintenance use
• Hex body design accepts standard die stocks and wrenches for positive drive
• Single-piece unit sold individually — no minimum beyond one unit

Compatibility

Designed as a rethreading die for 7/16-20 left-hand UNF external threads on fasteners, fittings, valve stems, or threaded rod where left-hand thread restoration is required.

Installation Notes

Rethreading dies are installed and driven by a qualified machinist or maintenance technician using a proper die stock or wrench matched to the hex body size. Always clean and deburr the damaged thread before starting the die to avoid cross-threading or die damage. Apply cutting oil during use to extend die life and improve thread finish. Secure the workpiece firmly before applying torque to prevent movement and uneven thread cutting.