Carmex 16IR8NPTBXC Threading Insert 8 Tpi Npt Carbide

Product Description

The CARMEX 16IR8NPTBXC is a solid carbide laydown threading insert designed for cutting internal NPT (National Pipe Taper) threads at 8 threads per inch. The insert carries a BXC manufacturer grade and features a PVD-applied TiN coating for improved wear resistance and tool life. With a 3/8-inch inscribed circle and a thickness of 0.146 inches, this right-hand insert fits standard 16IR-style toolholders. It is suited for use across a wide range of workpiece materials, making it a versatile choice for production threading operations. Licensed machinists and CNC operators working in plumbing, HVAC fabrication, and industrial piping applications are the primary users.

This insert is used in internal NPT thread cutting applications on lathes and CNC turning centers. The 30-degree included angle and 8 TPI geometry match standard NPT taper thread profiles used in pipe fittings, valves, and fluid system components. The universal material compatibility designation covers ferrous and non-ferrous metals, stainless, high-temp alloys, and non-metallic machinable materials, making this insert appropriate for job shops and production environments handling varied material grades.

Key Features

• Solid carbide construction for rigidity and wear resistance in threading operations
• PVD TiN coating applied via physical vapor deposition for extended tool life
• Right-hand internal NPT thread geometry at 8 TPI with 30-degree included angle
• 3/8-inch inscribed circle (0.3750 inches) fits 16IR-style toolholders
• Universal workpiece material compatibility across material codes H, K, M, N, P, and S
• Certified to CE, ISO 13485:2016, ISO 14001:2015, and ISO 45001 standards

Compatibility

Designed for use in 16IR-style laydown threading toolholders. Cuts standard internal NPT taper threads at 8 TPI. Compatible with workpiece material codes H, K, M, N, P, and S as designated by the manufacturer.

Installation Notes

Installation is performed by machinists or CNC technicians. Power down and lock out the machine before seating or replacing the insert. Ensure the insert pocket and clamping surfaces are clean and free of chips before securing the insert to manufacturer torque specifications for the toolholder. Verify thread profile and taper with a calibrated NPT thread gauge after the first test pass before committing to full production runs.