Carmex 16IR14UNMXC/G Threading Insert 14 Tpi 3/8 in Internal Un

Product Description

The CARMEX 16IR14UNMXC/G is a solid carbide laydown threading insert designed for cutting internal UN threads on CNC lathes and turning centers. It runs at 14 threads per inch with a 60-degree included angle, making it compatible with the Unified National thread standard used throughout North American manufacturing. The insert carries a PVD-applied TiN coating under the MXC grade designation, which uses a micrograin carbide substrate for improved edge retention and heat resistance. At 0.375 inches inscribed circle and 0.146 inches thick, it seats in standard 16IR toolholders. Machinists and CNC programmers working in job shops and production environments install this insert for internal threading passes.

This insert is suited for right-hand internal threading operations on a wide range of workpiece materials. The universal primary workpiece material rating covers carbon steels, stainless steels, cast irons, nonferrous alloys, and heat-resistant superalloys, corresponding to ISO material groups H, K, M, N, P, and S. It is a strong general-purpose choice for shops threading UN fastener profiles in both prototype and production runs on turning equipment.

Key Features

• Solid micrograin carbide substrate for increased wear resistance and edge stability
• PVD TiN coating under the MXC grade for extended tool life across varied materials
• 14 TPI UN internal thread profile with 60-degree included angle
• Right-hand cut geometry for standard lathe threading operations
• 3/8 inch inscribed circle fits standard 16IR toolholder pockets
• Universal material compatibility covering ISO groups H, K, M, N, P, and S

Compatibility

Designed as an OEM-style replacement insert for standard 16IR internal threading toolholders used in CNC turning applications requiring UN thread forms at 14 TPI.

Installation Notes

Installation is performed by CNC machinists and toolroom technicians. Before seating the insert, ensure the toolholder pocket and clamping hardware are free of chips and debris to prevent improper seating. Torque the clamping screw to the toolholder manufacturer specification using the appropriate Torx or hex key. Confirm thread profile and pitch with a thread gauge before running a full production pass.