Milwaukee Tool 49-57-5342 Hex Rethreading Die 5/16-18 Unc

Product Description

The MILWAUKEE TOOL 49-57-5342 is a hex rethreading die designed to restore damaged or corroded external threads on fasteners and threaded rod. Built from carbon steel, this die cuts a 5/16-18 UNC right-hand thread profile and seats into a 1.0000-inch hex holder for secure, no-slip driving. Part of the Hex-LOK series, it is sized at 1/2 inch thick and is intended for use by mechanics, electricians, plumbers, and general trades professionals who need a fast, reliable way to chase and restore threads in the field or shop.

This die is suited for restoration work on 5/16-18 UNC fasteners commonly found in mechanical assemblies, equipment frames, and structural connections across residential and light commercial applications. The right-hand thread direction matches standard fastener orientation, making it compatible with typical bolt-and-nut configurations encountered during maintenance and repair work. It is sold individually, making it a practical single-replacement option when one size is worn or missing from an existing set.

Key Features

• 5/16-18 UNC thread size for restoring standard unified coarse external threads
• Carbon steel construction provides the hardness needed to chase damaged threads on common fastener materials
• 1.0000-inch hex drive fits standard Hex-LOK die holders for stable, centered cutting
• Right-hand thread direction matches conventional fastener orientation
• 1/2-inch thickness suits compact die stock handles and rethreading tool sets
• Non-adjustable design ensures a consistent, fixed thread profile on every pass

Compatibility

Designed for use with Hex-LOK series die holders accepting a 1.0000-inch hex die. Intended as an OEM-style replacement or supplemental die for rethreading tool sets that use 1.0000-inch hex-drive dies.

Installation Notes

Thread restoration dies are typically used by mechanics, pipefitters, and general trades professionals during equipment maintenance. Before use, secure the workpiece and apply cutting oil to the die face to reduce heat and extend die life. Drive the die slowly with steady, even pressure to avoid cross-threading or die damage. Always clean loose debris and rust from the damaged thread area before running the die.