Hertel K099414AS Spiral Point Tap 3/8-16 Unc Bottoming Hss

Product Description

The HERTEL K099414AS is a spiral point tap designed to cut 3/8-16 UNC threads in through-hole and blind-hole applications. It features a bottoming chamfer, which allows threading close to the bottom of a hole. Manufactured from high-speed steel (HSS) with a bright, uncoated finish, this tap is built for general-purpose tapping in ferrous and non-ferrous materials. With 3 flutes and an H3 thread limit, it holds tight tolerances appropriate for a Class 3B fit. Thread length is 1.25 inches with a right-hand cut. Machinists, tool-and-die workers, and maintenance mechanics rely on this style of tap for production and repair work.

This tap is suited for manual and machine tapping operations in job shop, maintenance, and production environments. The bottoming chamfer style makes it the correct choice when threads must extend to the base of a blind hole or when a plug or taper tap has already started the thread. The 3/8-16 UNC thread form is one of the most common fastener thread standards in North American manufacturing, making this tap a frequent requirement in fabrication, assembly, and repair workflows. It is appropriate for use in drill presses, CNC machines, tapping heads, and hand tapping.

Key Features

• Bottoming chamfer allows threading to the base of blind holes
• High-speed steel construction provides durability across a range of workpiece materials
• 3 flutes with H3 thread limit for Class 3B fit precision
• Right-hand thread direction, 3/8-16 UNC standard
• Bright, uncoated finish suitable for use with cutting fluids
• 1.25-inch thread length accommodates standard-depth tapping applications

Compatibility

Designed as an OEM-style replacement or standard tooling tap for use in any manual or CNC tapping setup requiring a 3/8-16 UNC bottoming tap with an H3 thread limit and Class 3B fit.

Installation Notes

Installation should be performed by a qualified machinist or maintenance mechanic familiar with tapping operations. Always use an appropriate cutting fluid for the workpiece material to extend tool life and improve thread quality. Ensure the tap is properly aligned with the drilled hole before engagement to prevent tap breakage. Reverse the tap periodically during hand tapping to break chips, and inspect the tap for wear or damage before each use.