Accupro T2644523 Spiral Flute Tap 7/16-14 3 Flute

Product Description

The ACCUPRO T2644523 is a spiral flute tap designed for cutting 7/16-14 unified coarse internal threads in through-hole and modified bottoming applications. Built from 3% vanadium high speed steel with a bright/uncoated finish, it delivers solid wear resistance for general-purpose tapping. The 40-degree helix angle promotes efficient chip evacuation up and out of the hole, reducing the risk of chip packing. With a 2.13-inch overall length and a 3-flute configuration, this tap is suited for machine tapping operations in production and maintenance environments. Licensed machinists, tool-and-die technicians, and maintenance mechanics are the primary users.

This tap is optimized for use in aluminum workpieces, where its fast flute geometry and vanadium HSS construction handle the material's chip characteristics effectively. The modified bottoming chamfer allows threading closer to the bottom of a blind hole than a standard plug tap while still providing enough lead-in for reliable thread engagement. It is appropriate for use in CNC machining centers, drill presses, and tapping machines operating in light to medium production environments.

Key Features

• 7/16-14 UNC thread form with H3 thread limit for standard tolerance fits
• 3-flute spiral design with 40-degree helix angle for upward chip evacuation
• Modified bottoming chamfer allows threading near the base of blind holes
• 3% vanadium high speed steel construction for improved wear resistance over standard HSS
• Bright/uncoated finish suitable for use with cutting fluids in aluminum
• Right-hand flute and right-hand thread — standard machine tapping orientation

Compatibility

Designed for tapping 7/16-14 UNC threads in aluminum workpieces. H3 thread limit is compatible with standard 7/16-14 fastener fits in typical machine tapping applications.

Installation Notes

This tap is installed by a machinist or maintenance mechanic using a tapping head, CNC machine, or drill press with a tapping attachment. Always ensure the tap is properly aligned with the drilled hole before engagement to avoid tap breakage. Use an appropriate cutting fluid for aluminum to improve tool life and surface finish. Inspect the tap for wear or chipping before each use and replace if thread quality degrades.