Hertel K020123AS Spiral Point Tap M4x0.70 Metric Coarse

Product Description

The HERTEL K020123AS is a spiral point tap designed for cutting M4x0.70 metric coarse internal threads in through-hole applications. It features a plug chamfer that progressively starts the thread and pushes chips forward ahead of the tap, keeping the flutes clear during the cut. Built from high-speed steel with a bright uncoated finish, this tap handles a wide range of ferrous and non-ferrous materials. It is a 2-flute design with a D2 thread limit, a 0.75-inch thread length, and a shank diameter of 0.168 inches. Machinists and toolroom technicians use it for tapping operations in both manual and CNC environments.

This tap is suited for through-hole tapping in production and job-shop settings where chip ejection must be kept ahead of the cutting edge. The M4x0.70 metric coarse thread form is commonly specified in general mechanical assemblies, automotive components, and industrial equipment. The plug chamfer style makes it the standard choice when the hole runs completely through the workpiece. The right-hand thread direction matches conventional machine spindle rotation.

Key Features

• M4x0.70 metric coarse thread form for standard metric through-hole applications
• Spiral point design pushes chips forward, reducing clogging in through-hole work
• Plug chamfer provides a progressive thread start and smooth cutting action
• High-speed steel construction offers good wear resistance across a broad material range
• Bright uncoated finish maintains close tolerances with D2 thread limit
• Right-hand cut, 2-flute configuration compatible with standard tapping heads and CNC spindles

Compatibility

Designed as an OEM-style replacement or direct-use spiral point tap for M4x0.70 metric coarse through-hole tapping operations in standard tapping chucks, tapping heads, and CNC tool holders accepting a 0.168-inch shank diameter.

Installation Notes

Installation of this tap should be performed by a qualified machinist. Secure the tap in a floating tapping chuck or rigid holder appropriate for the machine being used. Ensure the workpiece is properly fixtured and that through-holes are clear before beginning the tapping cycle. Apply cutting fluid appropriate to the workpiece material to extend tap life and improve thread finish.