Hertel K007285AS Spiral Point Sti Tap M6x1 Metric Coarse

Product Description

The HERTEL K007285AS is a spiral point STI tap designed for cutting internal threads in pre-drilled holes to STI (Screw Thread Insert) metric coarse specifications. Built from high-speed steel (HSS) with a bright/uncoated finish, this tap suits production and maintenance threading operations where standard thread inserts will be installed after tapping. It features a plug chamfer and 2-flute geometry, which pushes chips forward ahead of the cutting action, making it well-suited for through-hole threading applications. The overall length is 2-23/32 inches and the tap cuts M6 x 1 threads to a D2 thread limit tolerance.

This tap is intended for use in metal fabrication, maintenance repair, and manufacturing environments where STI threads are required to accept helical coil inserts such as those used to restore stripped threads or reinforce threaded connections in softer base materials. The M6 x 1 metric coarse designation makes it a standard size across a broad range of mechanical assemblies in industrial and commercial maintenance settings. Machinists, toolroom technicians, and MRO professionals are the primary users of this tap.

Key Features

• STI metric coarse thread form sized for M6 x 1 to accept helical coil thread inserts
• Spiral point geometry pushes chips forward, ideal for through-hole tapping
• High-speed steel construction provides durability across a range of workpiece materials
• Bright/uncoated finish suitable for use with cutting fluids and general-purpose threading
• Plug chamfer for standard through-hole starting and cutting engagement
• D2 thread limit tolerance for proper fit with STI insert specifications

Compatibility

Designed as an STI metric coarse tap for use in through-hole threading applications requiring M6 x 1 internal threads sized to accept helical coil thread inserts per STI thread standards.

Installation Notes

This tap should be installed and operated by a qualified machinist or toolroom technician using appropriate tapping equipment such as a tap wrench, drill press, or CNC machine center. Always use a suitable cutting fluid for the workpiece material to extend tool life and maintain thread quality. Ensure the workpiece is securely fixtured and the correct STI tap drill size is used prior to tapping. Inspect the tap for wear or chipping before each use and do not force a tap that meets resistance, as breakage may result.