Kennametal 3031733 Carbide Thread Mill Insert 20 Tpi

Product Description

The KENNAMETAL 3031733 is a carbide thread mill insert designed for internal UN thread milling applications. Manufactured to the KC610M grade, this insert uses a PVD-applied TiN/TiCN/TiN multilayer coating to extend tool life and maintain cutting-edge integrity at elevated speeds. At 20 teeth per inch (TPI), it is suited for producing fine UN-standard internal threads in a single helical milling pass. The insert style is TM25 and measures 3.56 millimeters in thickness. Carbide substrate combined with PVD coating provides thermal stability and wear resistance in ferrous and non-ferrous workpiece materials. Licensed HVAC, plumbing, electrical, and industrial machining shops stock this insert for high-precision thread-form work.

The 3031733 insert is used in CNC thread milling operations where internal UN threads must meet tight pitch accuracy and surface finish requirements. Its non-conical geometry suits standard through-hole and blind-hole internal threading on machining centers. The 20 TPI designation makes it appropriate for UN fastener thread forms commonly encountered in industrial, mechanical, and fluid-system component manufacturing. Minimum order quantity is 2 inserts; packaging ships as a quantity of 1 per pack.

Key Features

• KC610M carbide grade with PVD-applied TiN/TiCN/TiN multilayer coating for extended wear resistance
• 20 TPI cutting geometry for UN-standard internal thread milling
• TM25 insert style for compatibility with designated KENNAMETAL thread mill bodies
• Non-conical insert geometry for standard through-hole and blind-hole applications
• 3.56 mm insert thickness providing rigid cutting-edge support
• Lightweight at 0.1 pounds, reducing toolholder mass impact in high-speed applications

Compatibility

Designed as a direct-fit replacement insert for KENNAMETAL TM25-style thread mill toolholders configured for internal UN thread milling at 20 TPI.

Installation Notes

Installation of thread mill inserts should be performed by a qualified machinist or tooling technician. Power down and lock out the machining center spindle before seating or replacing inserts. Use the appropriate torx or hex key as specified by the toolholder manufacturer to achieve proper clamping torque without over-stressing the insert pocket. Verify insert seating and runout with a dial indicator before resuming cutting operations.