Hertel H08698367 Threading Insert 8 Tpi 3/8 in Ic Un

Product Description

The HERTEL H08698367 is a laydown-style threading insert designed for right-hand internal UN thread cutting. Built from solid carbide with a TiC/TiN coating, this insert delivers the wear resistance and edge retention required for production threading on a variety of workpiece materials. The insert carries the HG630TR manufacturer grade designation and cuts at 8 threads per inch (TPI) with a 3/8-inch inscribed circle and a nominal thickness of 0.146 inches. It is intended for use in qualified laydown threading toolholders on CNC lathes and manual turning equipment where repeatable thread form accuracy is required.

This insert is suited for internal threading operations in machining environments ranging from job shops to production floor applications. The UN thread standard makes it applicable across common unified inch fastener and fitting thread profiles. The right-hand cutting geometry and 0-degree relief angle are matched to laydown-style insert pockets. Machinists, toolroom technicians, and CNC operators working on internal threading of steel, cast iron, and similar machinable materials will find this insert appropriate for standard UN thread forms at 8 TPI.

Key Features

• Solid carbide substrate for high wear resistance in threading applications
• TiC/TiN multilayer coating extends tool life and reduces built-up edge
• 8 TPI cutting geometry for standard UN internal thread profiles
• 3/8-inch inscribed circle fits standard laydown threading toolholder pockets
• Right-hand cut orientation for conventional internal threading setups
• HG630TR grade designation suited for a range of ferrous workpiece materials

Compatibility

Designed as a laydown-style replacement or standard-use threading insert for toolholders accepting the 16IR insert style with a 3/8-inch inscribed circle and 0-degree relief angle in UN internal threading applications.

Installation Notes

Installation is performed by qualified machinists or CNC toolroom technicians. Power down and lock out the machine before seating or replacing inserts. Ensure the toolholder pocket is clean and free of chips before mounting; debris under the insert will affect thread form accuracy. Follow the toolholder manufacturer's torque specifications for the clamping screw — do not overtighten, as carbide inserts are brittle and can crack under excess clamping force.