Carmex 16ER11.5NPT Threading Insert 11.5 Tpi Npt Carbide

Product Description

The CARMEX 16ER11.5NPT is a solid carbide laydown threading insert engineered for external NPT thread cutting on CNC lathes and turning centers. Running at 11.5 threads per inch with a 3/8-inch inscribed circle and a thickness of 0.146 inches, this insert is built to produce accurate tapered pipe threads to NPT standards. The uncoated bright finish and P30 carbide grade make it suitable for a broad range of workpiece materials. Licensed machinists and CNC operators rely on this insert for high-precision threading operations where consistent thread form and dimensional accuracy are critical.

This insert is designed for external right-hand NPT threading applications across a wide variety of materials, including steel, stainless steel, cast iron, non-ferrous metals, and high-temperature alloys. It is well suited to production and job-shop environments where tapered pipe thread connections must meet tight tolerances. The 16 ER insert style is a standard laydown format compatible with appropriate ER-style threading toolholders. Typical applications include threading pipe fittings, valves, and fluid system components.

Key Features

• External right-hand NPT thread form at 11.5 TPI for tapered pipe thread applications
• Solid carbide P30 grade with uncoated bright finish for universal material compatibility
• 3/8-inch inscribed circle and 0.146-inch thickness in standard 16 ER laydown style
• Compatible with H, K, M, N, P, and S workpiece material groups per ISO classification
• Meets CE, ISO 13485:2016, ISO 14001:2015, and ISO 45001 standards
• 30-degree included angle for accurate NPT thread geometry

Compatibility

Designed for use with 16 ER-style external threading toolholders that accept laydown inserts with a 3/8-inch inscribed circle. Suitable for NPT threading across material groups H, K, M, N, P, and S as defined by ISO workpiece material classification.

Installation Notes

Installation should be performed by a qualified machinist or CNC operator. Ensure the machine spindle is fully stopped and locked out before indexing or replacing inserts. Seat the insert securely in the toolholder pocket and verify clamping torque per the toolholder manufacturer specification before resuming cutting operations. Always confirm thread pitch and insert style match the toolholder and programmed threading cycle before the first pass.