Accupro T2640303 Spiral Point Tap 8-36 3 Flutes Plug

Product Description

The ACCUPRO T2640303 is a spiral point tap designed for cutting internal threads in through-hole applications. It features an 8-36 thread size, 3 flutes, and a plug chamfer that helps start the tap squarely and drive chips forward ahead of the cutting edge. Constructed from 3% Vanadium High Speed Steel (HSS), the tap offers improved wear resistance and edge retention over standard HSS tooling. The bright finish provides a clean, uncoated surface suited for general-purpose threading. With an overall length of 2.125 inches and a 13 mm thread length, this tap fits standard tap holders and is appropriate for use by machinists, tool-and-die professionals, and maintenance technicians.

This tap is intended for threading through-holes in steel and similar ferrous materials in general machining, fabrication, and maintenance-repair-operations (MRO) environments. The spiral point design pushes chips forward rather than backing them out, making it well-suited for CNC tapping cycles and hand-tapping in through-hole bores. The H3 thread limit produces threads within a controlled tolerance range appropriate for standard fastener fits in steel workpieces.

Key Features

• Spiral point geometry drives chips forward, reducing clogging in through-hole tapping
• 3% Vanadium HSS construction for improved hardness and edge retention versus standard HSS
• Plug chamfer (3-5 thread lead) for easy starting and general-purpose through-hole threading
• H3 thread limit for controlled tolerance fits in steel applications
• Bright finish — uncoated surface suitable for use with a wide range of cutting fluids
• Right-hand thread direction, compatible with standard tap holders and CNC spindles

Compatibility

Designed as a general-purpose 8-36 spiral point tap compatible with standard tap holders accepting a 4.27 mm shank diameter. Intended for threading through-holes in steels.

Installation Notes

This tap should be installed by a qualified machinist or maintenance technician using a calibrated tap holder or tapping head appropriate for the shank diameter. Always ensure the workpiece is securely fixtured and the spindle is aligned perpendicular to the bore before starting the thread. Apply a suitable cutting fluid for steel to extend tool life and improve thread finish. Do not reverse the tap under power without confirming the machine cycle supports rigid tapping or a tension-compression holder is in use.