Century Drill Tool 96203 5/16-18 Nc Hex Threading Die

Product Description

The CENTURY DRILL TOOL CO INC 96203 is a 5/16-18 national coarse fractional hex die designed for hand cutting external threads on round stock. Heat treated and tempered to file-hard condition, this die delivers consistent thread geometry pass after pass. At 1 inch across the flats, it fits standard die stocks and tap-and-die sets sized for fractional hex dies. Sold in a package of 2, it suits shops and field technicians who want a backup on hand. Typical users include plumbers, HVAC technicians, electricians, and general maintenance professionals who need to recut or form 5/16-18 NC threads in the field or at the bench.

This hex die is suited for hand threading applications on bolts, rods, and threaded fastener stock in residential and light commercial settings. The 5/16-18 NC thread specification is one of the most common fractional coarse-thread standards in trade work, found in structural hardware, equipment mounting hardware, and mechanical assemblies across HVAC, plumbing, and electrical trades. The 2-piece package makes it practical for stocking a service van or tool crib without ordering in bulk.

Key Features

• 5/16-18 NC thread form for one of the most common fractional coarse-thread sizes in trade applications
• Heat treated and tempered to file-hard condition for extended service life
• Precision-cut threads for consistent, accurate thread formation on each pass
• 1 inch across the flats fits standard fractional hex die stocks
• Designed for hand cutting operations — no lathe or power threading machine required
• Package of 2 units per order

Compatibility

Designed for use in standard die stocks and tap-and-die sets that accept 1-inch-across-the-flats fractional hex dies for hand threading of 5/16-18 NC external threads.

Installation Notes

This die is intended for hand threading use with a compatible die stock — do not attempt to run it in a power threading machine unless the stock is rated for powered operation. Secure the workpiece firmly in a vise before threading to prevent movement and ensure straight thread entry. Apply cutting oil to the die and workpiece to reduce friction and extend die life. Inspect threads with a go/no-go gauge or mating nut after cutting to verify thread accuracy before assembly.