Hertel K008642AS Straight Flute Tap 1-14 Uns Hss

Product Description

The HERTEL K008642AS is a straight flute tap designed to cut 1-14 UNS internal threads in a single-pass operation. Built from high speed steel with a bright, uncoated finish, this tap delivers consistent thread form in a range of ferrous and non-ferrous materials. The taper chamfer distributes cutting load across the leading threads for controlled engagement, making it well suited for through-hole tapping where chip evacuation along straight flutes is practical. With 4 flutes and a class 3B fit tolerance, it produces tight, high-accuracy threads. Overall length is 5.125 inches and the tool weighs 0.61 pounds.

This tap is applied in precision machining environments where 1-14 UNS threaded holes are required. The 3B class of fit indicates a standard tolerance suitable for bolted assemblies where close but not interference-fit threads are needed. The H4 thread limit designation confirms the tap is ground to produce threads toward the high end of tolerance, accommodating typical tool wear over a production run. Right-hand thread direction follows standard convention for UNS fastener applications in general industrial, maintenance, and repair machining work.

Key Features

• 1-14 UNS thread form with 4 straight flutes for through-hole tapping applications
• Taper chamfer distributes cutting force across multiple leading threads for smooth entry
• High speed steel construction provides durability across a range of workpiece materials
• Bright, uncoated finish compatible with a wide variety of cutting fluids
• Class 3B fit and H4 thread limit for consistent, high-accuracy thread production
• Right-hand thread direction, no coolant-through requirement

Compatibility

Designed as a standard replacement or production tap for applications requiring 1-14 UNS internal right-hand threads in through-hole configurations.

Installation Notes

Installation of this tap is performed by machinists using a tapping head, tap wrench, or CNC machine tool configured for the correct thread pitch and feed rate. Secure the workpiece and ensure proper alignment before engaging the tap to avoid tap breakage or thread runout. Apply an appropriate cutting fluid for the workpiece material to extend tool life and improve thread finish. Follow standard shop safety practices when handling cutting tools with sharp flutes and chamfer edges.