Kennametal 1724338 Threading Insert 16 Tpi Unj Carbide

Product Description

The KENNAMETAL 1724338 is a solid carbide laydown threading insert designed for external UNJ thread forms at 16 threads per inch (TPI). Carrying the ISO code LT16ER16UNJ and manufactured to the KC5010 grade, this insert features a PVD-applied TiAlN coating that supports high cutting performance across a range of demanding workpiece materials. The right-hand configuration suits standard external threading operations. With a 3/8 inch (9.53 mm) inscribed circle and a thickness of 0.143 inches (3.44 mm), this insert seats in compatible LT-style toolholders and delivers consistent thread geometry on precision machined components.

This insert is intended for professional machining operations targeting steel, stainless steel, cast iron, superalloys, and titanium. The UNJ thread standard is common in aerospace and high-strength fastener applications where a controlled root radius is required to reduce stress concentration. The KC5010 grade with TiAlN coating is suited to both wet and dry cutting conditions at elevated cutting speeds. Machinists and CNC operators working in production or job-shop environments will find this insert appropriate for tight-tolerance external threading passes on turned components.

Key Features

• ISO code LT16ER16UNJ - right-hand external UNJ thread form at 16 TPI
• KC5010 solid carbide grade with PVD TiAlN coating for wear and heat resistance
• 3/8 inch inscribed circle (9.53 mm) for accurate seating in LT16-series toolholders
• Thickness of 0.143 inches (3.44 mm) for positive laydown insert registration
• Compatible workpiece materials include steel, stainless steel, cast iron, superalloys, and titanium
• Hole diameter of 0.1551 inches (3.94 mm) for secure clamping in the toolholder pocket

Compatibility

Designed for use in LT16-series laydown threading toolholders that accept ER-style inserts with a 3/8 inch inscribed circle. Suitable for external UNJ threading operations on steel, stainless steel, cast iron, superalloys, and titanium workpieces.

Installation Notes

Installation is performed by a qualified machinist or CNC operator. Power down and lock out the machine spindle before seating or removing inserts. Ensure the toolholder pocket is clean and free of chips before placing the insert to maintain proper seating and thread geometry. Follow the toolholder manufacturer's clamping torque specifications and do not overtighten the insert screw.