Hertel H08694762 Threading Insert 24 Tpi 3/8 in Ic Un

Product Description

The HERTEL H08694762 is a laydown threading insert designed for right-hand internal UN thread cutting operations. Built from solid carbide with a TiC/TiN coating, it delivers consistent thread form and wear resistance in demanding machining environments. The insert carries a 16IR style designation, a 3/8 inch inscribed circle, and cuts at 24 threads per inch. A 0.146 inch thickness and zero-degree relief angle define its seating geometry. This insert is installed and indexed by machinists and CNC operators performing internal threading passes on lathes and turning centers in production or job-shop settings.

This insert is suited for internal threading of UN-standard fastener and component threads in ferrous and non-ferrous materials. The 24 TPI specification targets fine-thread applications common in hydraulic fittings, instrumentation hardware, and precision mechanical assemblies. The TiC/TiN finish extends tool life on abrasive workpiece materials. This insert is sold individually, with a minimum order quantity of 10 units, making it appropriate for shop stock replenishment or toolroom inventory.

Key Features

• Solid carbide substrate for rigidity and edge retention in interrupted and continuous threading cuts
• TiC/TiN multilayer coating reduces friction and extends wear life
• 24 TPI cutting edge conforms to UN thread standard for internal thread profiles
• 16IR insert style with 3/8 inch inscribed circle fits standard laydown threading toolholders
• Right-hand cutting geometry for conventional internal threading direction
• Zero-degree relief angle provides stable seating in laydown-style pockets

Compatibility

Designed for use in laydown threading toolholders accepting 16IR-style inserts with a 3/8 inch inscribed circle. Confirm toolholder pocket geometry and seating requirements before installation.

Installation Notes

This insert is installed by machinists using appropriate insert-seating tools and torque drivers specified by the toolholder manufacturer. Power down and lock out the machine spindle before indexing or replacing inserts. Inspect the toolholder pocket for debris or damage prior to seating a new insert. Follow the toolholder manufacturer guidelines for clamping force to avoid micro-fracture of the carbide substrate.