Milwaukee Tool 49-57-5357 Hex Rethreading Die 7/16-20 Unf

Product Description

The MILWAUKEE TOOL 49-57-5357 is a hex rethreading die designed to restore damaged or corroded external threads to their original specification. Part of the Hex-LOK series, this die is machined from carbon steel and sized for 7/16-20 UNF right-hand threads. The 1-inch hex body seats securely in a standard die stock or wrench, providing the torque needed to clean up fastener threads without cutting new material. At 1/2 inch thick, it is compact enough for use in tight service environments. Licensed mechanics, maintenance technicians, and plumbers reach for rethreading dies when a bolt or fitting thread is too damaged to accept a nut cleanly but not damaged enough to warrant full replacement.

This die is suited for light industrial, automotive, and mechanical maintenance applications where 7/16-20 UNF threads appear on fasteners, studs, and fittings. The right-hand thread direction covers the vast majority of standard fastener configurations encountered in field service and shop repair work. Its compact form factor makes it practical for both bench use and on-site service calls where carrying a full tap-and-die set is not always feasible.

Key Features

• 7/16-20 UNF thread size restores fine-pitch right-hand external threads
• Carbon steel construction provides durability for repeated rethreading passes
• 1-inch hex body fits standard die stocks and adjustable wrenches
• 1/2 inch thickness suits compact Hex-LOK series die handles
• Non-adjustable design ensures consistent thread form on every pass
• Sold individually for targeted replacement without purchasing a full set

Compatibility

Designed for use with die stocks and holders that accept a 1-inch hex die. Compatible with the MILWAUKEE TOOL Hex-LOK series die handle system. Suitable for rethreading 7/16-20 UNF right-hand external threads on fasteners, studs, and threaded fittings.

Installation Notes

Rethreading dies are typically used by mechanics, maintenance technicians, and trade professionals performing fastener repair. Before use, clean debris and loose rust from the damaged thread area. Apply cutting oil to the die and the workpiece to reduce friction and extend die life. Turn the die slowly and back off periodically to clear chips, following standard thread-chasing practice.