Hertel K008133AS Straight Flute Tap 5-44 Unf Hss

Product Description

The HERTEL K008133AS is a straight flute tap designed to cut 5-44 UNF internal threads in a wide range of materials. It features a plug chamfer entry, three flutes, and is manufactured from high-speed steel with a bright, uncoated finish. The plug chamfer provides a gradual thread lead-in, making it suitable for through-hole and moderate-depth blind-hole applications. At 1-15/16 inches overall length with a 5/8-inch thread length, this compact tap is well-suited for small-fastener work. The H2 thread limit maintains a 2B class of fit, delivering reliable thread tolerance for standard mechanical assemblies. Machinists and tooling professionals install this tap in hand-tapping operations or low-speed machine tapping setups.

This tap is intended for threading #5-44 UNF holes in ferrous and non-ferrous metals, plastics, and similar machinable materials. The straight flute geometry makes it most effective in through-holes or shallow blind holes where chip evacuation is manageable. It is a common choice for instrument-scale and light-duty precision work where the fine 44-thread-per-inch pitch is required. Right-hand thread direction matches standard UNF fastener orientation. The bright, uncoated finish is appropriate for general-purpose use without specialized cutting fluid requirements, though using a suitable cutting oil will extend tool life.

Key Features

• 5-44 UNF straight flute tap with plug chamfer for gradual thread lead-in
• Three-flute design provides chip clearance in through-hole and shallow blind-hole applications
• High-speed steel construction for durability across general-purpose tapping operations
• H2 thread limit holds 2B class of fit for standard UNF thread tolerance
• Right-hand thread direction, compatible with standard UNF fastener assemblies
• Bright, uncoated finish suited for general-purpose use with or without cutting fluid

Compatibility

Designed for use in any standard tap wrench, T-handle, or low-speed machine tapping setup that accepts a 0.141-inch shank diameter. Intended for cutting 5-44 UNF threads per ASME B1.1 standards at a 2B class of fit.

Installation Notes

This tap should be installed and operated by qualified machinists or tooling professionals familiar with threading operations. Ensure the workpiece is securely fixtured and the tap is aligned perpendicular to the drilled hole before beginning. Apply an appropriate cutting oil or tapping fluid to extend tap life and improve thread quality. Back the tap out periodically when hand-tapping to break and clear chips, particularly in materials prone to chip packing.