Osg 2949001 Spiral Flute Tap 7/16-20 Unf Vanadium Hss

Product Description

The OSG 2949001 is a spiral flute tap designed for cutting 7/16-20 UNF internal threads in a wide range of ferrous materials. It features a 45-degree helix angle that efficiently evacuates chips up and out of the hole, making it well-suited for blind-hole tapping applications. Manufactured from 3% vanadium high-speed steel and finished with a steam oxide coating, this tap offers improved wear resistance and reduced friction during cutting. The modified bottoming chamfer allows threading close to the bottom of a blind hole. Overall length is 3-5/32 inches, with a shank diameter of 0.194 inches and a thread limit of H7.

This tap is appropriate for use in machining, metalworking, and maintenance-repair-operations environments where precise 7/16-20 UNF threads are required. It is rated for use in alloy steel, carbon steel, cast iron, stainless steel, die steel, and hardened steel. The right-hand flute direction and right-hand thread orientation suit standard threading operations. Machinists, tool-and-die makers, and maintenance technicians working on medium-to-hard ferrous materials will find this tap a direct fit for production and repair threading tasks.

Key Features

• 45-degree helix angle promotes upward chip evacuation for blind-hole tapping
• Modified bottoming chamfer enables threading close to hole bottom
• 3% vanadium HSS construction provides hardness and wear resistance in tough ferrous materials
• Steam oxide coating reduces friction and improves lubrication retention
• H7 thread limit designation ensures controlled oversize fit for standard tolerance applications
• Right-hand thread and right-hand flute direction for standard CNC and manual tapping

Compatibility

Designed for cutting 7/16-20 UNF right-hand internal threads in alloy steel, carbon steel, cast iron, stainless steel, die steel, and hardened steel workpieces.

Installation Notes

This tap is intended for use by machinists and qualified metalworking personnel. Secure the workpiece and ensure the tap is properly aligned with the drilled hole before engaging. Use an appropriate cutting fluid or tapping compound for the workpiece material to extend tool life and improve thread quality. Do not reverse the tap without backing off chip pressure in hardened or tough materials, as this can cause tap breakage.