Osg 34300608 Spiral Flute Sti Tap M6x1.00 3 Flute

Product Description

The OSG 34300608 is a spiral flute STI tap designed for cutting M6x1.00 metric coarse thread inserts in a wide range of workpiece materials. Built from vanadium high-speed steel with a V finish coating, this tap delivers consistent cutting performance and tool longevity in production and maintenance environments. The 45-degree helix angle promotes efficient chip evacuation up the flutes, reducing the risk of chip packing in blind or semi-blind holes. A modified bottoming chamfer allows the tap to thread closer to the bottom of a hole than a standard plug chamfer, making it well suited for applications where thread engagement depth is critical. Machinists and tool-and-die professionals are the primary users of this tap.

This tap is intended for STI (Screw Thread Insert) applications in metric coarse threading operations. The 6H class of fit makes it appropriate for producing threads that accept standard helical inserts, commonly used in aerospace, automotive, and general manufacturing repair work where worn or stripped threads need to be restored to full load-bearing capacity. The right-hand flute direction is compatible with standard right-hand threading setups on manual lathes, CNC machining centers, and tapping fixtures. It is part of OSG Series 343STI.

Key Features

• M6x1.00 metric coarse thread size with 6H class of fit for STI insert applications
• 45-degree helix angle promotes upward chip evacuation, reducing packing in blind holes
• Modified bottoming chamfer allows threading closer to the bottom of a hole
• Vanadium high-speed steel construction for wear resistance in a variety of workpiece materials
• V finish coating for reduced friction and improved tap life
• Right-hand flute direction, 3 flutes, Series 343STI

Compatibility

Designed for use in STI tapping operations requiring M6x1.00 metric coarse threads with a 6H class of fit, compatible with standard helical thread insert systems in that size and pitch.

Installation Notes

This tap should be installed and operated by qualified machinists or tool-and-die technicians familiar with tapping speeds, feeds, and cutting fluids appropriate for the workpiece material. Always ensure the workpiece is securely fixtured and the spindle is properly aligned before beginning the tapping operation. Use a cutting fluid or tapping compound suitable for the base material to extend tap life and improve thread quality. Inspect the tap for wear or chipping before each use and replace if cutting edges are compromised.