Kennametal 1724340 Threading Insert 14 Tpi Unj Carbide

Product Description

The KENNAMETAL 1724340 is a laydown-style threading insert designed for single-point external thread turning on CNC lathes and turning centers. Carrying ISO code LT16ER14UNJ, it cuts right-hand UNJ-profile threads at 14 threads per inch (TPI). The insert is manufactured from solid carbide in grade KC5010 and receives a PVD-applied TiAlN coating for elevated heat resistance and extended tool life in interrupted and continuous threading passes. The 3/8-inch (9.53 mm) inscribed circle and 0.1430-inch thickness conform to standard ER-style laydown seating geometry. Installation is performed by licensed machinists and tooling setup technicians.

This insert is suited for threading steel, stainless steel, cast iron, superalloys, and titanium workpieces. The UNJ thread form, with its controlled root radius, is common in aerospace and high-fatigue structural applications where AS8879 or equivalent thread standards are specified. At 14 TPI, the insert targets coarse-pitch fastener and fitting threads in those material families. It seats in standard LT16 ER-style laydown toolholders and is oriented for right-hand external threading operations on conventional lathe setups.

Key Features

• ISO code LT16ER14UNJ - ER-style laydown geometry for right-hand external threading
• 14 TPI UNJ thread form with controlled root radius for high-fatigue applications
• KC5010 solid carbide grade with PVD TiAlN coating for thermal and wear resistance
• 3/8-inch inscribed circle, 0.1430-inch thickness - fits standard LT16 ER toolholders
• Rated for steel, stainless steel, cast iron, superalloys, and titanium workpieces
• Cutting edge to theoretical edge length: 0.0390 inches; face of insert to tip centerline: 0.0470 inches

Compatibility

Designed as an OEM-style replacement or direct-fit insert for standard LT16 ER-style laydown threading toolholders used in right-hand external threading applications.

Installation Notes

Installation is performed by qualified machinists or tooling technicians. Power down and lock out the machine spindle before seating or replacing inserts. Use the appropriate torx or clamp screw driver to the toolholder manufacturer's specified procedure - do not overtighten the clamp screw. Inspect the insert pocket and clamp for chips or debris before seating the new insert to ensure proper registration and cutting edge alignment.