Hertel K008020AS Hand Tap 1-72 Unf Taper 2-flute Hss

Product Description

The HERTEL K008020AS is a 1-72 UNF straight-flute hand tap designed for cutting internal threads in through-holes and blind holes across a range of ferrous and non-ferrous materials. Built from high speed steel with a bright uncoated finish, it runs a taper chamfer that guides the tap into the workpiece gradually, reducing the torque required to start the thread. The H2 thread limit and 2B class of fit make it appropriate for standard commercial thread tolerances used in precision fastening applications. With an overall length of 1.6875 inches and a thread length of 0.375 inches, this is a compact tap suited for tight-clearance work.

This tap is used in machine shops, maintenance and repair operations, and production environments where 1-72 UNF threads are required. The taper chamfer style is the standard first choice when tapping from the entry side of a workpiece, distributing cutting load across the first several threads. The straight flute geometry suits most materials where chip packing is not a concern. It is typically driven by a tap wrench or a low-speed tapping machine and is appropriate for hand-tapping operations in steel, aluminum, brass, and similar materials.

Key Features

• 1-72 UNF thread size with right-hand thread direction
• Taper chamfer distributes cutting load across entry threads for easier starting
• High speed steel construction provides hardness and wear resistance for general-purpose tapping
• Bright uncoated finish suitable for use with cutting fluid on most common materials
• 2B class of fit and H2 thread limit meet standard commercial thread tolerance requirements
• 2-flute straight flute design works well in through-hole and shallow blind-hole applications

Compatibility

Designed as a standard hand tap for cutting 1-72 UNF internal threads. Compatible with tap wrenches and tapping machines sized for the 0.1410-inch shank diameter.

Installation Notes

Use appropriate cutting fluid to extend tool life and improve thread finish. Secure the workpiece firmly before tapping to prevent movement. Apply steady, even pressure and back off periodically to break chips. Inspect the tap for wear or chipping before each use, as a damaged tap can ruin threads or break in the hole.