Century Drill Tool 92931 7pc Rethreading Die Set Fractional

Product Description

The CENTURY DRILL TOOL CO INC 92931 is a 7-piece right-hand fractional coarse thread rethreading die set designed to restore damaged external threads on bolts and studs. Each die features a hexagonal body for use with a standard die stock or wrench. The set is machined from high carbon alloy steel for extended service life under repeated use. Unlike a cutting die, these rethreading dies chase and reform existing thread profiles without crosscutting or undercutting, making them the correct choice when preserving thread engagement is critical. This set is suited for mechanics, maintenance technicians, and trade professionals who need a reliable bench-side thread repair solution.

This set covers the most common fractional fastener sizes encountered in HVAC equipment, plumbing fixtures, electrical enclosures, and general mechanical assemblies. It is appropriate for light industrial, commercial, and residential maintenance applications where corroded, seized, or mechanically damaged threads on standard coarse-pitch fasteners need to be cleaned up before reassembly. The six included die sizes span 1/4 inch through 9/16 inch, addressing the majority of fractional bolt and stud diameters found in typical trade work. These dies are not intended for use on hardened threads or for cutting new threads from blank stock.

Key Features

• 7-piece set covers 1/4 inch, 5/16 inch, 3/8 inch, 7/16 inch, 1/2 inch, and 9/16 inch fractional sizes
• Right-hand coarse thread configuration matches the most common fastener standard in trade applications
• Hexagonal die body accepts standard die stocks and wrenches
• High carbon alloy steel construction for durability and long tool life
• Chases and reforms thread profiles without crosscutting or undercutting existing threads
• Not for use on hardened threads or for cutting new threads from unthreaded stock

Compatibility

Designed for use on right-hand fractional coarse-thread bolts and studs ranging from 1/4 inch to 9/16 inch in diameter. Fits standard hexagonal die stocks sized for fractional dies.

Installation Notes

Thread repair with rethreading dies is typically performed by maintenance technicians and trade professionals as part of equipment disassembly and reassembly. Before use, clean the fastener of debris and apply a cutting or threading oil to reduce friction and improve die life. Start the die squarely on the fastener to avoid cross-threading. Do not attempt to use these dies on hardened fasteners or to cut fresh threads on unthreaded material.