Kennametal 2429572 Carbide Thread Mill Insert Nptf

Product Description

The KENNAMETAL 2429572 is a carbide thread mill insert engineered for cutting NPTF (National Pipe Taper Fuel) threads in both internal and external applications. Manufactured to the STN insert style, it carries the KC635M grade designation and features a TiAlN (Titanium Aluminum Nitride) coating applied via PVD process. The insert delivers 11.5 teeth per inch and is sized with a 3/8 inch (0.3750 inch) inscribed circle. Machinists and tool-and-die professionals install this insert into compatible thread milling toolholders for producing tapered pipe thread forms in production or maintenance environments.

This insert is suited for thread milling operations where NPTF tapered pipe thread standards are required, covering both internal bore threading and external thread profiling. It is commonly used in CNC machining centers running thread mill cycles on ferrous and non-ferrous workpieces. The KC635M carbide grade with TiAlN finish provides wear resistance appropriate for interrupted cutting conditions typical in thread milling. Minimum order quantity is 10 pieces; each package contains 1 insert.

Key Features

• STN insert style for thread milling toolholder compatibility
• KC635M carbide grade with PVD-applied TiAlN coating for extended tool life
• NPTF thread standard — internal and external cutting capability
• 11.5 teeth per inch thread pitch
• 3/8 inch inscribed circle (0.3750 inch decimal)
• Non-conical geometry for standard thread mill applications

Compatibility

Designed as an OEM-style replacement or direct-use insert for thread milling toolholders accepting the STN insert style with a 3/8 inch inscribed circle in NPTF thread form configurations.

Installation Notes

Installation should be performed by a qualified machinist or tooling technician. Ensure the milling spindle is fully powered down and the tool is secured in a suitable torque-rated toolholder before seating or replacing the insert. Follow the toolholder manufacturer's clamping procedure to avoid insert seating errors. Verify thread program parameters in the CNC controller match the 11.5 TPI NPTF specification before cutting.