Carmex 16IR12ABUTP25C Threading Insert 12 Tpi 3/8 in Ic

Product Description

The CARMEX 16IR12ABUTP25C is a solid carbide laydown threading insert designed for right-hand internal American Buttress thread cutting at 12 threads per inch (TPI). Built to P25C manufacturer grade and C5 material grade, this insert is finished with a PVD-applied TiN coating that extends tool life across a wide range of workpiece materials. The 3/8-inch inscribed circle (0.375 inches) and 0.146-inch thickness conform to the 16IR insert style geometry. The 45-degree included angle and zero relief angle are matched to Buttress thread profile requirements. This insert is specified by CNC machinists and toolroom professionals running internal threading operations on lathes and turning centers.

The 16IR12ABUTP25C is suited for internal threading applications across universal workpiece material categories, including steel, stainless steel, cast iron, non-ferrous metals, heat-resistant alloys, and titanium, covering material codes H, K, M, N, P, and S. It is appropriate for both production and job-shop environments where American Buttress thread forms are required. The P25C grade and TiN PVD coating make it a general-purpose choice for medium-duty cutting conditions on a turning center or manual lathe with appropriate toolholding.

Key Features

• Solid carbide construction at P25C manufacturer grade and C5 material grade for rigidity and wear resistance
• PVD TiN coating applied via physical vapor deposition for extended insert life
• Right-hand internal American Buttress thread profile at 12 TPI and 45-degree included angle
• 3/8-inch inscribed circle (0.375 inches) conforming to 16IR insert style
• Zero relief angle geometry matched to Buttress form threading requirements
• Universal material compatibility across steel, stainless, cast iron, non-ferrous, high-temp alloys, and titanium

Compatibility

Designed for use in 16IR-style laydown threading insert toolholders configured for internal Buttress thread cutting. Consult your toolholder manufacturer specifications to confirm 16IR seat geometry compatibility before installation.

Installation Notes

Installation and indexing of threading inserts should be performed by a qualified machinist or CNC toolroom technician. Ensure the machine spindle is fully stopped and all motion is locked out before changing inserts. Seat the insert fully and evenly into the toolholder pocket and secure with the appropriate clamping screw to manufacturer torque specifications. Verify thread form and pitch with a thread gauge on the first part before committing to a production run.