Hertel K007352AS Spiral Flute Sti Tap M3x0.50 3 Flute Hss

Product Description

The HERTEL K007352AS is a high speed steel (HSS) spiral flute STI tap designed for cutting Screw Thread Insert (STI) threads in a metric coarse M3x0.50 profile. With a 3-flute design and a 52-degree helix angle, this tap efficiently evacuates chips up and out of the hole during through-hole and blind-hole tapping operations. The plug chamfer provides a gradual thread lead-in, making it well-suited for general-purpose threading applications. The bright finish indicates an uncoated surface, suitable for use in a range of materials including mild steels, aluminum, and non-ferrous metals. The overall length is 2 inches, and the tool weighs approximately 0.15 pounds.

This tap is intended for machinists, toolmakers, and maintenance technicians who need to create STI-profile threads for thread inserts in metric M3x0.50 applications. STI taps cut an oversized thread that accepts helical coil inserts, commonly used to repair damaged threads or to reinforce threaded holes in softer base materials. It is appropriate for use in machine shops, production environments, and maintenance and repair operations (MRO) settings where metric thread insert installation is required.

Key Features

• M3x0.50 metric coarse thread profile sized for STI (Screw Thread Insert) applications
• 3-flute spiral design with 52-degree helix for efficient chip evacuation in blind and through holes
• Plug chamfer provides gradual thread engagement for general-purpose threading
• High speed steel construction offers durability across a broad range of workpiece materials
• Bright (uncoated) finish for standard-duty use in non-abrasive materials
• D1 thread limit for close tolerance control on finished threads

Compatibility

Designed for use in applications requiring M3x0.50 metric coarse STI threads for helical coil thread inserts. Suitable for use with standard tapping machines, CNC machining centers, and hand-tapping setups configured for metric M3 STI thread preparation.

Installation Notes

This tap should be installed and operated by a qualified machinist or toolmaker familiar with tapping speeds, feeds, and cutting fluid requirements for the base material being threaded. Always secure the workpiece firmly and ensure proper alignment of the tap to the hole axis before beginning the threading operation. Use an appropriate cutting fluid or tapping compound to extend tool life and improve thread finish. Inspect the tap for wear or chipping before each use and replace if cutting edges show signs of deterioration.