Carmex 16IR11.5NPTFMXC Threading Insert 11.5 Tpi Nptf

Product Description

The CARMEX 16IR11.5NPTFMXC is a solid carbide laydown threading insert designed for cutting internal NPTF threads at 11.5 threads per inch. It carries a TiN coating applied via PVD process and is manufactured in the MXC grade using micrograin carbide. The insert is right-hand orientation with a 30-degree included angle, a 3/8-inch inscribed circle (0.3750 inches), and a thickness of 0.1460 inches. It is engineered for precision thread-form accuracy in tapered pipe thread applications and suits a wide range of workpiece materials. Licensed machinists and CNC lathe operators are the primary installers of this insert type.

This insert is suited for internal NPTF tapered pipe thread cutting on CNC lathes and manual threading lathes in both production and job-shop environments. Its universal material grade compatibility makes it a practical choice for threading operations across steel, stainless, cast iron, non-ferrous metals, and high-temperature alloys. Typical applications include fitting and connector machining in fluid-system, hydraulic, and pneumatic component production.

Key Features

• Solid micrograin carbide construction for edge stability and wear resistance
• TiN coating via PVD process for improved surface hardness and tool life
• 11.5 TPI internal NPTF thread form with 30-degree included angle
• Right-hand cutting orientation, laydown insert style
• 3/8-inch inscribed circle (0.3750 inches) for standard 16-size toolholders
• Universal primary workpiece material compatibility across multiple material codes

Compatibility

Designed as an OEM-style replacement or direct-fit insert for 16IR-series threading toolholders that accept a 3/8-inch inscribed circle laydown insert geometry.

Installation Notes

Installation is performed by a qualified machinist or CNC tooling technician. The machine spindle must be stopped and the toolholder must be fully secured before seating or replacing the insert. Use the appropriate insert clamp and torx or hex key as specified by the toolholder manufacturer. Confirm thread-form accuracy with a NPTF ring or plug gauge after first pass to verify proper fitment before production runs.