Kennametal 1743922 Threading Insert 18 Tpi Un KC5025

Product Description

The KENNAMETAL 1743922 is a solid carbide laydown threading insert designed for single-point thread cutting on CNC lathes and turning centers. Carrying the ISO code LT16NR18UN, it cuts right-hand internal UN threads at 18 threads per inch (TPI). The insert is manufactured from carbide with a PVD-applied TiAlN coating, which improves heat resistance and tool life when threading steel, stainless steel, cast iron, superalloys, and titanium. The NR insert style and size code 16 conform to standard toolholder geometry, making fitment straightforward for machinists and toolroom technicians working with compatible boring bar holders.

This insert is suited for internal threading operations in production and job-shop environments where UN thread forms are required. At 18 TPI, it covers common fastener and fitting thread pitches found in mechanical assemblies across industrial, automotive, and aerospace applications. The 3/8-inch inscribed circle and 0.143-inch thickness place it in the small-to-medium insert category, appropriate for threading bores in ferrous and exotic-alloy workpieces. Minimum order quantity is 10 inserts; each package contains 1 insert.

Key Features

• Solid carbide substrate with PVD TiAlN coating for extended tool life on ferrous and exotic materials
• Right-hand internal UN thread form at 18 TPI
• NR insert style, size code 16, ISO code LT16NR18UN
• 3/8-inch (9.53 mm) inscribed circle for consistent geometry and seating
• Manufacturer grade KC5025 optimized for steel, stainless steel, cast iron, superalloys, and titanium
• Cutting edge to theoretical edge length of 0.031 inches; face of insert to tip centerline of 0.039 inches

Compatibility

Designed for use in NR-style laydown threading toolholders accepting a size 16 insert with a 3/8-inch inscribed circle. Compatible workpiece materials include steel, stainless steel, cast iron, superalloys, and titanium as specified by KENNAMETAL for the KC5025 grade.

Installation Notes

This insert is installed by a machinist or toolroom technician into a compatible NR-style laydown threading holder; consult the toolholder manufacturer's torque specification for the clamping screw. Power down and lock out the machine spindle before changing inserts. Inspect the insert pocket and clamping surfaces for chips or debris before seating the new insert to ensure proper contact geometry. Follow applicable shop safety procedures and machine guarding requirements during the insert change.