Kennametal 2384533 Carbide Thread Mill Insert Un 6 Tpi

Product Description

The KENNAMETAL 2384533 is a carbide thread mill insert designed for internal thread milling operations. Manufactured in the STN insert style and coated with TiAlN via a PVD process, it delivers wear resistance and thermal stability in demanding cutting applications. The KC635M grade carbide substrate is engineered for consistent thread form accuracy on UN thread forms at 6 teeth per inch. With an inscribed circle of 0.625 inches, this insert fits thread mill toolholders sized for that bore. Licensed HVAC, plumbing, and mechanical tradespeople who run CNC thread milling operations on ferrous and non-ferrous materials will recognize this insert as a direct production-grade consumable.

This insert is suited for internal UN thread milling in machining centers and CNC mills. It applies to production environments where single-pass or multi-pass thread milling replaces tapping, especially in harder materials or blind-hole applications where tap breakage is a concern. The 6 TPI configuration is common in coarser unified thread series work, including pipe fittings, structural fasteners, and heavy mechanical assemblies. It is sold individually per package, with a minimum order quantity of 5 units.

Key Features

• STN insert style with KC635M carbide grade for high-performance thread milling
• TiAlN coating applied via PVD process for improved heat and wear resistance
• Designed for internal UN thread forms at 6 teeth per inch
• Inscribed circle of 0.625 inches for compatibility with matching toolholder bores
• Non-conical geometry for standard thread mill insert seats

Compatibility

Designed as an OEM-style replacement insert for thread mill toolholders accepting STN-style inserts with a 0.625-inch inscribed circle in UN internal thread milling applications.

Installation Notes

Installation should be performed by a qualified machinist or CNC tooling technician. Ensure the machine spindle is fully stopped and all axes are at a safe home position before seating or replacing inserts. Use the correct torx or hex key as specified by the toolholder manufacturer to achieve proper clamping torque without over-tightening the insert screw. Confirm insert seating and runout with a dial indicator before resuming thread milling operations.