Carmex 16ER27NPTFP25C Threading Insert 27 Tpi Nptf Carbide

Product Description

The CARMEX 16ER27NPTFP25C is a laydown-style threading insert designed for right-hand external NPTF threading operations on CNC lathes and turning centers. Manufactured from solid carbide in the P25C grade (material grade C5), it carries a PVD-applied TiN coating for improved wear resistance and tool life. At 27 threads per inch, this insert is engineered for cutting American National Standard Taper Pipe Fuel (NPTF) threads, which require a high-accuracy taper profile for pressure-tight connections without sealant. The 3/8-inch inscribed circle and 0.146-inch thickness conform to the 16 ER geometry standard, making seating and indexing straightforward on compatible toolholders.

This insert is suited for production and job-shop environments where NPTF external threads are machined into fittings, adapters, or hydraulic components. It performs in steel and similar materials consistent with its C5 carbide grade designation. Right-hand cutting orientation means it is used with standard forward-feed threading cycles. Machinists and CNC operators in the fluid power, plumbing supply, and industrial fitting sectors will encounter this insert frequently when producing tapered pipe thread profiles to NPTF standards.

Key Features

• Solid carbide construction in P25C grade for durability in steel threading applications
• PVD TiN coating applied via physical vapor deposition for extended edge life
• 27 TPI NPTF thread profile for pressure-tight tapered pipe connections
• Right-hand external cutting geometry with 16 ER insert style
• 3/8-inch inscribed circle for secure toolholder seating
• 0.146-inch insert thickness conforming to 16 ER geometry standard

Compatibility

Designed to seat in toolholders that accept the 16 ER laydown insert style. Verify toolholder clamping bore and insert pocket geometry before installation to confirm fit.

Installation Notes

Installation should be performed by a qualified machinist or CNC tooling technician. Power down and lock out the machine before indexing or replacing the insert. Use the appropriate torx or clamping screw driver specified by the toolholder manufacturer to secure the insert without overtightening the clamping screw. Inspect the insert pocket for debris or wear before seating the new insert to ensure proper contact and runout.