Century Drill Tool 92935 5pc Metric Rethreading Die Set

Product Description

The CENTURY DRILL TOOL CO INC 92935 is a 5-piece right-hand metric rethreading die set designed to restore damaged external threads on bolts and studs. Each die is hexagonal in profile and manufactured from high carbon alloy steel for extended service life. The set covers five common metric thread sizes: 6.0x1.00, 7.0x1.00, 8.0x1.25, 10.0x1.50, and 12.0x1.75. Unlike cutting dies, these rethreading dies chase and reform existing thread profiles without crosscutting or undercutting, making them the correct choice for thread repair rather than thread creation. Mechanics, plumbers, and HVAC technicians reach for this type of set during field repairs where bolt or stud threads have been galled, corroded, or mechanically damaged.

This set is suited for general maintenance and repair applications across residential and light commercial environments. Typical use cases include restoring threads on fasteners found in HVAC equipment, plumbing fixtures, electrical enclosures, and mechanical assemblies. Because the dies reform rather than cut, they are appropriate for use on standard-hardness fastener steel. They are not intended for use on hardened threads or for cutting new threads from blank stock. The five sizes included address a broad range of common metric fastener diameters encountered in everyday trade work.

Key Features

• Five right-hand metric rethreading dies in one set: 6.0x1.00, 7.0x1.00, 8.0x1.25, 10.0x1.50, and 12.0x1.75
• High carbon alloy steel construction for durability and long tool life
• Hexagonal die profile for use with standard wrenches or die holders
• Reforms and chases damaged threads without crosscutting or undercutting
• Designed for thread repair only — not for cutting new threads or use on hardened fasteners

Compatibility

Designed for use on standard-hardness metric bolts and studs with right-hand thread profiles in the five sizes included. Not compatible with hardened fasteners or left-hand thread applications.

Installation Notes

Thread repair with rethreading dies is typically performed by mechanics, HVAC technicians, plumbers, and electricians as part of equipment service or assembly work. Before use, ensure the fastener is not hardened steel, as these dies are not rated for hardened material. Apply a thread cutting oil or lubricant to the die and fastener to reduce friction and improve thread restoration. Turn the die onto the fastener using steady, controlled pressure, reversing a quarter turn periodically to clear debris.