Kennametal 1712620 Threading Insert Nptf 11.5 Tpi KC5025

Product Description

The KENNAMETAL 1712620 is a solid carbide laydown threading insert designed for external NPTF thread cutting on CNC lathes and turning centers. Cataloged under the ISO designation LT16ER115NPTFCB, it carries a PVD-applied TiAlN coating and is manufactured to grade KC5025. The insert produces right-hand external NPTF threads at 11.5 threads per inch (TPI) with a 3/8 inch (9.53 mm) inscribed circle and a thickness of 0.1430 inches (3.44 mm). KC5025 is a coated carbide grade suited for threading operations that demand consistent thread form accuracy and edge retention across interrupted and continuous cuts.

This insert is intended for precision threading of pipe fittings, couplings, and fluid-system components requiring NPTF (National Pipe Taper Fuel) thread profiles. It is well-suited to machining steel, stainless steel, cast iron, superalloys, and titanium. Typical applications include production turning on manual or CNC equipment in industrial machining, oil and gas component manufacturing, hydraulic fitting production, and general metalworking shops. The CB chipbreaker geometry assists in managing chip flow during threading passes.

Key Features

• ISO designation LT16ER115NPTFCB confirms insert style, size, thread standard, and chipbreaker in a single code
• PVD TiAlN coating provides thermal resistance and wear protection for extended tool life
• KC5025 carbide grade is engineered for steel, stainless steel, cast iron, superalloys, and titanium threading
• Right-hand external NPTF thread form at 11.5 TPI for tapered pipe thread applications
• CB chipbreaker geometry promotes controlled chip evacuation during threading passes
• 3/8 inch inscribed circle with 0.1551 inch hole diameter for standard laydown insert toolholders

Compatibility

Designed for use in laydown threading toolholders accepting ER-style inserts with a size 16 designation and a 3/8 inch inscribed circle. Consult your toolholder documentation to confirm insert pocket geometry before installation.

Installation Notes

Threading inserts of this type are installed and torqued by a qualified machinist or CNC tooling technician following the toolholder manufacturer's clamping specifications. Power down and lock out the machine spindle before changing inserts. Handle carbide inserts with care to avoid chipping cutting edges; do not use damaged inserts. Verify thread form and pitch with a calibrated thread gauge after the first pass before committing to full production runs.