Kennametal 1724405 Threading Insert Npt 11.5 Tpi Carbide

Product Description

The KENNAMETAL 1724405 is a solid carbide laydown threading insert designed for cutting internal NPT threads on a lathe or turning center. Designated with ISO code LT16NR115NPT and manufactured to grade KC5010, this insert produces right-hand internal threads at 11.5 threads per inch to match the National Pipe Taper standard. The PVD-applied TiAlN coating resists heat and wear during high-speed threading passes. With a 3/8-inch inscribed circle and a thickness of 0.1430 inches (3.44 mm), the insert seats securely in compatible LT-style toolholders. It is installed by machinists and CNC lathe operators in production and job-shop environments.

This insert is suited for threading internal NPT pipe-thread forms in a range of workpiece materials including steel, stainless steel, cast iron, superalloys, and titanium. The KC5010 grade with TiAlN PVD coating is selected for its toughness and thermal resistance, making it appropriate for both interrupted and continuous threading cuts in these demanding materials. It is a single-insert package intended for operations where NPT thread conformance and repeatable tool life are required.

Key Features

• Solid carbide construction with PVD TiAlN coating for extended wear resistance
• Right-hand internal NPT thread profile at 11.5 TPI
• KC5010 grade engineered for steel, stainless steel, cast iron, superalloys, and titanium
• 3/8-inch (9.53 mm) inscribed circle for stable insert seating
• Hole diameter of 0.1551 inches (3.94 mm) for secure clamping in LT-style holders
• Cutting edge to theoretical edge length of 0.0430 inches; face of insert to tip centerline of 0.0590 inches

Compatibility

Designed as an OEM-style replacement threading insert for LT16-series laydown toolholders accepting NR-style inserts with a 3/8-inch inscribed circle and NPT thread form.

Installation Notes

Installation is performed by qualified machinists or CNC turning technicians. Ensure the machine spindle is fully stopped and the toolholder is clear of the workpiece before seating or replacing the insert. Use the appropriate torx or hex key to torque the clamping screw to the toolholder manufacturer's specification - do not overtighten, as carbide inserts are brittle. Verify thread form and pitch with a calibrated NPT thread gauge after the first test pass before committing to a full production run.