Hertel K008176AS 6-40 Unf Spiral Point Tap 2 Flute Hss

Product Description

The HERTEL K008176AS is a spiral point tap designed for cutting 6-40 UNF right-hand internal threads in through-hole applications. Built from high speed steel with a bright finish, this tap features a bottoming chamfer and 2-flute spiral point geometry that pushes chips forward ahead of the cutting action. It carries an H2 thread limit and a 2B/3B class of fit, making it suitable for standard-tolerance fastener threads. Overall length is 2.0 inches with a thread length of 11/16 inch. It is intended for use by machinists and maintenance technicians working on close-tolerance threaded assemblies.

This tap is suited for production and maintenance threading operations where a 6-40 UNF thread form is required. The bottoming chamfer allows threading close to the bottom of a blind hole after a starter or plug tap has already roughed the thread. Typical applications include light mechanical assemblies, instrument hardware, and precision components where fine-thread engagement is required in small-diameter holes. The 2-flute configuration keeps the tap compact for restricted-access work.

Key Features

• Bottoming chamfer for threading near the base of blind holes
• Spiral point geometry pushes chips forward to clear the cutting zone
• H2 thread limit for standard-tolerance 2B/3B class of fit
• High speed steel construction for general-purpose threading
• Bright finish with no coating for easy wear inspection
• Right-hand thread direction, 6-40 UNF form

Compatibility

Designed for cutting 6-40 UNF right-hand internal threads per 2B/3B class of fit standards in through-hole and near-bottom blind-hole applications.

Installation Notes

Installation is performed by qualified machinists using a tap wrench, tapping head, or machine spindle aligned perpendicular to the workpiece surface. Power down or disengage the spindle before loading or removing the tap. Use appropriate cutting fluid for the workpiece material to reduce heat and extend tool life. Follow shop-standard feeds and speeds for high speed steel taps at this thread size to avoid tap breakage.