Milwaukee Tool 49-57-5371 Hex Rethreading Die 5/8-18 Unf

Product Description

The MILWAUKEE TOOL 49-57-5371 is a hex rethreading die designed to restore damaged or corroded external threads on fasteners and threaded rod. It cuts a 5/8-18 UNF right-hand thread profile using a carbon steel construction that holds up to repeated field use. The 1-7/16 inch hex outer diameter fits standard die stocks and ratcheting die holders. Electricians, plumbers, pipefitters, and general contractors reach for rethreading dies when a bolt or stud has been cross-threaded or surface-rusted to the point where a nut will no longer run cleanly. This die cleans and re-cuts the thread form without requiring a full thread-cutting setup.

This die is suited for maintenance and repair work on existing threaded fasteners in residential and commercial construction, mechanical rooms, and industrial service environments. The 5/8-18 UNF thread size is common on fine-thread bolts found in automotive, structural, and mechanical assembly applications. The non-adjustable fixed die design keeps the thread profile consistent across repeated passes, making it a reliable shop and field tool for service technicians who need to salvage threaded components rather than replace them.

Key Features

• 5/8-18 UNF right-hand thread for restoring fine-pitch external threads
• Carbon steel construction provides durability for repeated rethreading passes
• 1-7/16 inch hex outer diameter fits standard die stocks and ratcheting holders
• Non-adjustable design maintains consistent thread profile on every pass
• Compact 1/2 inch thickness for use in tight-clearance applications

Compatibility

Designed as an OEM-style replacement rethreading die for use with standard die stocks and ratcheting die holders accepting a 1-7/16 inch hex outer diameter.

Installation Notes

Rethreading dies are typically used by trade professionals including electricians, plumbers, and pipefitters performing repair work on existing threaded fasteners. Ensure the workpiece is secured before applying the die, and apply cutting oil to the thread surface to reduce friction and extend die life. Always start the die squarely on the fastener to avoid cutting a skewed thread. Follow applicable worksite safety protocols when working near live electrical or pressurized systems.