Tungaloy 5901584 Threading Insert 16IR115NPT-B AH725

Product Description

The TUNGALOY 5901584 is a solid carbide laydown threading insert designed for cutting internal NPT tapered pipe threads. Designated style 16IR115NPT-B in grade AH725, it features a PVD-applied TiAlN coating that improves wear resistance and thermal stability across a wide range of workpiece materials. The insert carries a 60-degree included angle and a 0.09 mm corner radius, making it suited for producing the tapered flank geometry required by NPT thread standards. Machining technicians and CNC operators install this insert into compatible laydown-style threading toolholders on lathes and turning centers.

This insert is intended for right-hand internal NPT threading operations. The AH725 grade with TiAlN coating is rated for universal workpiece material compatibility, covering steel, stainless, cast iron, non-ferrous alloys, high-temp alloys, and aluminum. It is a practical choice for shops producing pipe fittings, fluid system components, and instrumentation connections that require leak-resistant tapered thread forms compliant with NPT standards.

Key Features

• Solid carbide substrate with PVD TiAlN coating for extended tool life across diverse workpiece materials
• 16IR insert style for right-hand internal NPT threading at 11.5 threads per inch
• 60-degree included angle matches NPT thread form geometry
• B chipbreaker designation for controlled chip flow during threading passes
• 3/8 inch inscribed circle; 1.5 mm (0.059 inches) thickness in a compact laydown profile
• TAC TungThread series with ISO-standard construction

Compatibility

Designed as an OEM-style replacement or direct-use insert for laydown threading toolholders accepting 16IR-style inserts within the TUNGALOY TAC TungThread series. Confirmed workpiece material codes include H, K, M, N, P, and S per supplier specifications.

Installation Notes

This insert is installed and changed by machinists or CNC tooling technicians; ensure the machine spindle is fully stopped and the toolholder is de-energized before seating or removing the insert. Use the appropriate torx or clamping screw specified by the toolholder manufacturer to secure the insert - do not overtighten. Verify insert orientation for right-hand internal threading before beginning a pass, and confirm the programmed thread pitch matches 11.5 threads per inch before cutting.