Kennametal 2429576 Carbide Thread Mill Insert Nps 11.5 Tpi

Product Description

The KENNAMETAL 2429576 is a carbide thread mill insert designed for precision thread milling in both internal and external applications. Manufactured to the NPS (National Pipe Straight) thread standard at 11.5 teeth per inch (TPI), this insert suits threading operations where consistent thread form and tool life are priorities. The STN insert style is finished with a TiAlN coating applied via PVD process, which improves heat resistance and wear performance at elevated cutting speeds. The inscribed circle measures 0.375 inches (9.53 mm). Licensed machinists and CNC programmers specify this insert for pipe thread milling on production and maintenance work.

This insert is suited for thread milling operations on NPS pipe threads in both internal and external configurations. Typical applications include machining threaded ports, fittings, and pipe connections in metals where a straight pipe thread form is required. The NPS standard at 11.5 TPI makes this insert appropriate for 3/4-inch nominal pipe size thread work. It is used in machine shops, maintenance facilities, and production environments where thread milling is preferred over tapping for accuracy and tool longevity.

Key Features

• STN insert style with carbide substrate for rigidity and wear resistance
• TiAlN coating via PVD process for improved heat and oxidation resistance
• Compatible with both internal and external NPS thread milling
• 11.5 TPI matches NPS thread standard for pipe thread applications
• Inscribed circle of 0.375 inches (9.53 mm) for correct holder seating

Compatibility

Designed as an OEM-style replacement or production insert for thread mill toolholders accepting STN-style carbide inserts with a 0.375-inch inscribed circle.

Installation Notes

Installation should be performed by a qualified machinist or CNC tooling technician. Ensure the machine spindle is fully stopped and the tool is secured before changing inserts. Verify the insert seats correctly in the toolholder pocket and that all clamping screws are tightened to the toolholder manufacturer specifications. Confirm the programmed thread parameters match the 11.5 TPI NPS thread form before cutting.