Hertel K008190AS Straight Flute Tap 8-32 Unc Bottoming Hss

Product Description

The HERTEL K008190AS is a straight flute bottoming tap designed to cut internal threads in through-holes and blind holes where thread engagement must reach close to the bottom. Manufactured from high-speed steel (HSS) with a bright uncoated finish, this tap produces 8-32 UNC right-hand threads to a 3B class of fit and H2 thread limit. With 2 straight flutes and a bottoming chamfer of 1 to 2 threads, it is suited for threading soft to medium-hardness materials in production and maintenance environments. Overall length is 2.125 inches with a 0.75-inch thread length. Machinists and tool-and-die technicians are the typical users in both shop and field settings.

This tap is used in general machining, maintenance repair, and fabrication work wherever 8-32 UNC threaded holes are required. The bottoming chamfer style makes it the correct choice when threading must extend to the base of a blind hole after a taper or plug tap has started the thread. It is appropriate for use in drill presses, CNC machining centers, tapping machines, and hand tapping operations on ferrous and non-ferrous metals, as well as engineering plastics.

Key Features

• Bottoming chamfer (1-2 thread lead) for threading to the bottom of blind holes
• 8-32 UNC thread form with right-hand thread direction
• 3B class of fit and H2 thread limit for standard tolerance internal threads
• High-speed steel construction provides toughness and wear resistance in general-purpose tapping
• Bright uncoated finish suitable for use with cutting fluids across a range of work materials
• 2 straight flutes for chip clearance in short-chipping materials

Compatibility

Designed as an OEM-style replacement or direct-use straight flute bottoming tap for any application requiring 8-32 UNC internal threads to 3B class of fit. Compatible with standard tap holders, T-handle tap wrenches, and machine tapping chucks sized for this shank diameter.

Installation Notes

This tap should be installed by a qualified machinist or maintenance technician familiar with threading operations. Always use an appropriate cutting fluid matched to the work material to extend tool life and improve thread quality. Secure the workpiece firmly and align the tap perpendicular to the hole before applying torque to avoid tap breakage. When following a taper or plug tap in a blind hole, clear chips between passes before proceeding with the bottoming tap.