Hertel K008239AS Straight Flute Tap 10-24 Unc Bottoming Hss

Product Description

The HERTEL K008239AS is a straight flute bottoming tap designed for cutting 10-24 UNC internal threads in through-holes and blind holes where full thread depth close to the bottom is required. Manufactured from high-speed steel with a bright, uncoated finish, this tap delivers reliable performance across a wide range of materials encountered in general machining and metalworking. It features 2 flutes, a right-hand thread direction, and an H3 thread limit, making it suitable for producing 2B and 3B class-of-fit threads. The overall length is 2-3/8 inches with a 7/8-inch thread length. Machinists and toolroom professionals rely on this style of tap for production threading in manual and CNC tapping operations.

This tap is intended for use in machine shops, maintenance facilities, and manufacturing environments where 10-24 UNC threads are required. The bottoming chamfer allows threading to within 1 to 1.5 threads of the bottom of a blind hole, making it the correct choice when thread depth requirements cannot be met by a plug or taper chamfer tap. It is commonly used as the final tap in a two-tap or three-tap sequence when working in blind-hole applications. No coolant-through capability is present, so external cutting fluid application is standard practice with this tool.

Key Features

• Bottoming chamfer for threading close to the bottom of blind holes
• High-speed steel construction for broad material compatibility and re-sharpenability
• H3 thread limit for consistent 2B and 3B class-of-fit thread production
• 2-flute straight flute geometry for effective chip clearance in most materials
• Bright, uncoated finish suited for use with a variety of cutting fluids
• Right-hand thread direction, standard for 10-24 UNC applications

Compatibility

Designed as an OEM-style replacement or direct-use straight flute bottoming tap for any application requiring 10-24 UNC internal threads with a 2B or 3B class of fit.

Installation Notes

This tap should be installed by a qualified machinist familiar with threading operations and proper tap drill size selection for 10-24 UNC threads. Secure the workpiece firmly and ensure correct alignment before starting the tap to prevent breakage. Apply an appropriate cutting fluid throughout the operation and back off periodically to break chips when tapping blind holes. When used as part of a tapping sequence, complete the taper and plug tap passes before using this bottoming tap to achieve full thread depth.