Value Collection 364-0392 Hex Rethreading Die M39x4

Product Description

The VALUE COLLECTION 364-0392 is a hex rethreading die designed to restore damaged or corroded external metric threads to their original specification. Built from carbon steel, this die is suited for field repair and shop work where thread integrity on bolts, studs, and threaded rod must be recovered without full replacement. The M39x4 thread profile follows the metric coarse standard, and the 1-inch thickness provides the material engagement needed to clean and reform larger-diameter threads reliably. Maintenance technicians, millwrights, and pipe fitters reaching for a rethreading tool on heavy fasteners will find this die fits standard hex die stocks.

This die is appropriate for metric coarse thread restoration on M39x4 fasteners found in heavy industrial equipment, structural assemblies, and large-diameter mechanical connections. Right-hand thread direction matches the standard orientation for the vast majority of metric fasteners encountered in commercial and industrial maintenance work. The hex body allows the die to be driven with a die stock or held in a bench vise for controlled passes over a damaged thread.

Key Features

• M39x4 metric coarse thread profile restores standard large-diameter external threads
• Carbon steel construction provides the hardness required to rework steel and iron fastener threads
• 1-inch thickness delivers solid thread engagement across the full die width
• Right-hand thread direction for standard metric fastener applications
• Hex body design fits common die stocks and allows vise holding during use

Compatibility

Designed as an OEM-style replacement-grade rethreading die for use on M39x4 right-hand metric coarse external threads in industrial and commercial maintenance applications.

Installation Notes

Rethreading dies are installed and operated by maintenance technicians, millwrights, and machinists using a properly sized die stock. Before use, clean the damaged fastener of debris, rust, and burrs to reduce die wear and improve thread quality. Apply cutting oil generously during each pass to cool the die and carry away chips. Advance the die in short increments, backing off periodically to break the chip, and never force the die beyond its rated thread size.