Hertel K027737AS25 M5x0.80 Straight Flute Tap 4 Flute Hss Tin

Product Description

The HERTEL K027737AS25 is a straight flute plug tap designed for cutting M5x0.80 metric coarse internal threads in a wide range of materials. Manufactured from high-speed steel (HSS) with a titanium nitride (TiN) coating, this tap delivers improved wear resistance and extended tool life compared to uncoated HSS tooling. It features 4 flutes with a plug chamfer, providing a balance between thread starting ease and full thread engagement. The overall length is 2.375 inches, and the thread conforms to a 6H class of fit with a D4 thread limit. Right-hand thread direction. Installed by machinists and maintenance technicians in metalworking and fabrication environments.

This tap is suited for through-hole and moderate-depth blind-hole tapping operations where chip evacuation is managed manually or with cutting fluid. The straight flute geometry performs well in shorter-chipping materials such as cast iron, brass, and some aluminum alloys. The plug chamfer style makes it appropriate for general-purpose threading in production and maintenance settings where a starter tap is used separately for harder entry conditions.

Key Features

• M5x0.80 metric coarse thread, right-hand direction
• 4 straight flutes with plug chamfer for general-purpose threading
• High-speed steel construction with TiN coating for extended wear resistance
• 6H class of fit, D4 thread limit for standard metric tolerance requirements
• 2.375 inches overall length
• No coolant-through feature; suitable for conventional cutting fluid application

Compatibility

Designed as an OEM-style replacement or direct-use straight flute tap for standard M5x0.80 metric coarse tapping applications in machine shop, maintenance, and fabrication environments.

Installation Notes

Installation and use should be performed by qualified machinists or maintenance technicians familiar with tapping operations. Ensure the workpiece is securely fixtured and the tap is properly aligned before engagement to avoid tap breakage. Apply appropriate cutting fluid for the material being tapped. Replace the tap when thread quality degrades or cutting torque increases noticeably, as a worn tap can damage the workpiece or break in the hole.