Dormer M4 Thread Metric Standard Machine Threading Tap HSS Spiral Point E255M4

Dormer E255M4 Metric Standard Machine Threading Tap is engineered to deliver precision M4 threaded holes in a wide range of alloy steels and engineering materials. Built from high-quality High Speed Cobalt (HSS-E), this tap offers increased hardness and superior edge strength to ensure durability and long tool life.

The tap's bright finish with treated edges enhances cutting performance and reduces material adhesion, resulting in less swarf build-up and improved productivity during operation. Its back tapered design facilitates efficient chip evacuation, minimizing clogging and enabling faster machining cycles.

Featuring a spiral point geometry with a 7° cutting rake, the tap is optimized for machine tapping applications with medium to high production rates. Designed for right-hand threading with a pitch of 0.7 mm, it complies with ISO 529 and DIN 338 standards, guaranteeing consistent thread quality and tolerance.

This tap measures 63 mm in overall length with a shank diameter of 4.5 mm, making it compatible with standard collets and holders for machine tapping tools. It is suitable for use in industrial manufacturing, mechanical workshops, automotive, aerospace, and general engineering applications requiring accurate and reliable threading solutions.

Premium High Speed Cobalt (HSS-E) construction for hardness and edge strength. Bright finish with treated edge reduces wear and material adhesion. Back tapered profile for efficient chip evacuation. 7° spiral point and right-hand thread optimize cutting and thread formation.

Compliant with ISO 529 and DIN 338 industry standards. Overall length of 63 mm and shank diameter of 4.5 mm for versatile machine compatibility. Ideal for medium to high volume machine tapping in engineering materials. Explore more threading tooling solutions and related industrial hand tools in the EnvMart collection to optimize your manufacturing and maintenance operations.