Value Collection 81938240 Round Die 10-24 Unc Left Hand Hss

Product Description

The VALUE COLLECTION 81938240 is a round threading die designed to cut 10-24 UNC external threads in a left-hand direction. Made from high-speed steel, it holds an edge through repeated use on ferrous and non-ferrous materials. The adjustable design allows the cutting diameter to be fine-tuned for thread fit and to compensate for wear, extending the die's useful life. This die is a standard shop and field tool for machinists, maintenance technicians, and trade professionals who need to cut or restore left-hand threaded fasteners and fittings.

Left-hand threading dies like the 81938240 are used in applications where counter-rotation would loosen a conventional right-hand thread — such as certain mechanical linkages, turnbuckles, and specialty fastener assemblies. The 10-24 UNC designation indicates a No. 10 nominal diameter with 24 threads per inch on the Unified National Coarse standard, a common size across light mechanical and electrical hardware. This die suits bench work and on-site threading tasks where a standard round die stock is available.

Key Features

• Left-hand thread direction for counter-rotation applications
• High-speed steel construction for durability and edge retention
• Adjustable cutting diameter for precise thread fit and extended die life
• 10-24 UNC thread form per Unified National Coarse standard
• Standard round die form — fits common round die stocks

Compatibility

Designed as a replacement or supplemental round die for use in standard round die stocks sized for 10-24 UNC tooling. Confirm die stock bore diameter before ordering.

Installation Notes

Round dies are installed and used by machinists and maintenance technicians following standard threading procedures. Secure the workpiece firmly before engaging the die to prevent movement during thread cutting. Apply cutting oil to the die and workpiece to reduce friction and improve thread quality. Inspect the finished thread with a mating fastener or thread gauge before placing the assembly in service.