Hertel K007032AS Spiral Point Sti Tap 10-24 Unc Hss

Product Description

The HERTEL K007032AS is a spiral point STI tap designed for cutting Screw Thread Insert (STI) threads in through-hole applications. Made from high-speed steel with a bright/uncoated finish, it produces 10-24 UNC internal threads sized to accept helical coil thread inserts. The plug chamfer style makes it well suited for through-hole tapping where the tap can advance freely past the bottom of the hole. With 2 flutes and a spiral point geometry, the tap pushes chips forward ahead of the cutting edge, reducing chip clogging and improving hole quality in production environments.

This tap is used by machinists, maintenance technicians, and tool-and-die professionals working on thread repair, insert installation, and new part fabrication. STI taps are commonly specified when installing Helicoil or equivalent helical thread inserts to restore or strengthen threads in aluminum, cast iron, steel, and similar materials. The 10-24 UNC thread size covers a wide range of fastener applications in light mechanical assemblies, sheet metal work, and equipment repair.

Key Features

• Spiral point geometry pushes chips forward for cleaner through-hole tapping
• STI (Screw Thread Insert) thread form sized for helical coil insert installation
• High-speed steel construction provides durability across common engineering materials
• Plug chamfer allows progressive thread engagement in through-hole applications
• H2 thread limit provides controlled fit for consistent insert seating
• Helicoil Reference Number 3CSB for cross-reference with insert kit specifications

Compatibility

Designed for use with 10-24 UNC Screw Thread Insert (STI) thread systems. Helicoil reference number 3CSB confirms compatibility with corresponding helical coil insert kits requiring a 10-24 STI tap.

Installation Notes

This tap is installed by machinists or maintenance technicians using a tap wrench, tapping fixture, or machine spindle at appropriate low speeds with cutting fluid. Ensure the workpiece is securely fixtured and the drill hole diameter matches the STI tap drill size chart for 10-24 UNC before tapping. Do not reverse the tap without clearing chips when working in blind holes, and avoid applying side load to prevent tap breakage. Follow manufacturer insert installation procedures after tapping to ensure proper insert depth and engagement.