Accupro T2640562B Spiral Point Tap 1/2-13 3 Flute 2B

Product Description

The ACCUPRO T2640562B is a spiral point tap designed for cutting 1/2-13 UNC internal threads in ferrous materials. Built from 3% Vanadium High Speed Steel (HSS), this tap delivers increased wear resistance and toughness compared to standard M2 HSS, making it well-suited for production tapping in steels. It carries a plug chamfer (approximately 3-5 lead threads) for guided entry in through-hole applications and a 2B class of fit for standard commercial thread tolerances. The bright finish indicates no additional coating, keeping the profile close to ground dimensions. Overall length is 3.38 inches with a 29 mm thread length, and the shank diameter is 9.32 mm. Right-hand cut. This tap is a direct-drive tool installed by machinists and maintenance trades using a tap handle, drill press, or CNC tapping head.

This tap is intended for through-hole tapping operations in steels at 1/2-13 UNC. The spiral point geometry pushes chips ahead of the tap rather than packing them into the flute gullets, which makes it the preferred choice for through-hole production work over hand tapping or bottoming scenarios. It is not designed for blind holes where chip evacuation is restricted. Typical applications include threading holes in steel plate, structural fabrication, machine frames, and general maintenance work requiring 1/2-13 fastener engagement.

Key Features

• 1/2-13 UNC thread form, right-hand cut, 2B class of fit
• 3% Vanadium HSS construction for improved wear resistance over standard M2 HSS
• Spiral point geometry pushes chips forward, optimized for through-hole tapping
• Plug chamfer (approximately 3-5 lead threads) for guided thread entry
• 3 flutes provide chip clearance and cutting stability
• Bright finish, no coating — ground to close dimensional tolerance

Compatibility

Designed for tapping through-hole 1/2-13 UNC threads in steels; suitable for use with standard tap handles, drill press tap chucks, and CNC tapping heads accepting a 9.32 mm shank diameter.

Installation Notes

This tap should be installed by a qualified machinist or maintenance technician using the appropriate tap wrench, machine chuck, or tapping head rated for the shank diameter. Always ensure the workpiece is securely clamped and the tap is properly aligned axially before engagement to prevent tap breakage. Use a cutting fluid appropriate for steel to extend tool life and maintain thread quality. Do not use this tap in blind holes where chip evacuation cannot be maintained.