The Carmex Carbide Threading Insert for NPT and common thread profiles is a TiAlN-coated solution built for machinists who need reliable, high-precision threading across internal and external surfaces.

• Five length options: Inserts are available in five lengths, ranging from 12 mm to 40 mm, to fit a variety of hole depths and turning passes.
• Broad thread compatibility: Covers all common thread profiles, reducing the need to stock multiple tool types.
• Pitch range flexibility: Capable of handling pitches from 0.5 mm (32 TPI) to 6.0 mm (4 TPI) for diverse applications.
• Double-sided cutting edges: Each insert features two cutting edges to maximize usable life, with exceptions for BSPT / NPT / NPTF / American Buttress / API RD.
• Internal & external threading: For many profiles, the same insert can machine both internal and external threads, minimizing tool changes (except ISO / UN / NPSM / UNJ / Acme).
• NPT-focused design: Specifically optimized for NPT and related pipe-thread profiles, supporting accurate, consistent taps on threaded parts.
• 40-8NPT designation: Clear sizing and compatibility for standard NPT threading tasks.

This carbide threading insert set is engineered to deliver durable performance in demanding materials and high-speed threading. The TiAlN coating enhances hardness and wear resistance, helping maintain accuracy over longer runs and reducing tool downtime. With its versatile length and pitch options, it’s well-suited for job shops, contract manufacturers, and in-house production environments that require reliable threading across multiple standards without swapping inserts mid-operation.