Hertel K007281AS Spiral Point Sti Tap M3x0.5 Hss

Product Description

The HERTEL K007281AS is a spiral point STI tap designed for cutting Screw Thread Insert (STI) threads in M3 x 0.5 metric coarse applications. Built from high-speed steel (HSS) with a bright uncoated finish, this plug-chamfer tap is suited for threading operations that require a reliable STI thread form in steel, aluminum, and similar materials. At 2 inches overall length with a 2-flute design and D1 thread limit, it delivers controlled cutting action in through-hole applications. Machinists and maintenance technicians use it when installing helical thread inserts to restore or create durable internal threads.

This tap is used in machine shops, production environments, and maintenance repair operations where M3 x 0.5 STI threads are required. The plug chamfer style makes it suitable for through-holes, providing the progressive cutting entry needed for consistent thread form across a range of workpiece materials. It is a single-piece item packaged individually, appropriate for both bench work and light production use.

Key Features

• STI metric coarse thread form for use with helical thread inserts
• Plug chamfer provides progressive cutting entry in through-holes
• High-speed steel construction for general-purpose threading performance
• Bright uncoated finish suitable for use with standard cutting fluids
• D1 thread limit for controlled thread fit
• 2-flute design assists chip evacuation in short-chipping materials

Compatibility

Designed as an OEM-style replacement or standard tooling option for operations requiring M3 x 0.5 metric coarse STI taps in through-hole threading applications.

Installation Notes

This tap should be installed in a compatible tap holder or tapping chuck set to the correct speed for the workpiece material. Always apply appropriate cutting fluid to extend tool life and improve thread quality. Secure the workpiece firmly before tapping to prevent movement that could break the tap. Follow applicable shop safety procedures when operating drilling and tapping equipment.