Hertel K008273AS Straight Flute Tap 10-32 Unf Bottoming Hss

Product Description

The HERTEL K008273AS is a straight flute bottoming tap designed for threading 10-32 UNF holes in a wide range of shop and field machining applications. Built from high-speed steel (HSS) with a bright, uncoated finish, this tap delivers consistent thread form in materials where a standard or plug tap cannot reach the full thread depth. With 2 flutes and an H3 thread limit, it produces Class 2B threads to tight tolerance in blind or through holes. The 7/8-inch thread length and 2-3/8-inch overall length make it well suited for compact workpieces and restricted-access bore depths.

This bottoming tap is used in production machining, maintenance and repair operations, and field service work wherever a 10-32 UNF internal thread must be cut to the bottom of a blind hole. It is appropriate for use in manual tap handles, machine tapping heads, and CNC tapping cycles at controlled feed rates. Machinists, tool-and-die technicians, and maintenance mechanics typically reach for bottoming taps as the final step in a three-tap sequence after a taper and plug tap have already started the thread.

Key Features

• Bottoming chamfer allows threading to the full depth of blind holes
• High-speed steel construction provides hardness and wear resistance for ferrous and non-ferrous materials
• H3 thread limit ensures Class 2B fit tolerance for standard fastener assemblies
• 2-flute straight flute design aids chip clearance in shallow-depth threading operations
• Bright, uncoated finish is compatible with a wide range of cutting fluids and lubricants
• Right-hand thread direction for standard tapping operations

Compatibility

Designed as an OEM-style replacement or direct substitute for 10-32 UNF bottoming taps in standard tap handles, tapping heads, and CNC tapping tool holders accepting the corresponding shank diameter.

Installation Notes

This tap is installed by a machinist or maintenance technician using a standard tap wrench, tapping head, or CNC spindle configured for rigid or floating tap cycles. Secure the workpiece firmly before tapping and apply an appropriate cutting fluid for the base material to extend tool life and protect thread form. Avoid applying excessive torque or forcing the tap in hard materials, as HSS taps are susceptible to breakage under side load. Inspect the drilled hole for correct tap drill diameter before beginning the threading sequence.