Meet the Carmex Carbide Threading Insert—NPSF, TiAlN coated, engineered for machinists who tackle a wide range of thread profiles with a single, reliable cutting insert. It’s optimized for NPSF applications in the 14–18 NPSF range, delivering consistent performance on both internal and external threading tasks.

• TiAlN coating: Wear-resistant TiAlN coating enhances heat tolerance and extends insert life during high-speed threading.
• Five lengths (12–40 mm): Five length options to match your toolholder and thread pitch; pitches supported range from 0.5 mm / 32 TPI to 6.0 mm / 4 TPI, depending on length.
• Double-sided cutting edges: Each insert provides two cutting edges for extended use and easier indexing (except for BSPT / NPT / NPTF / American Buttress / API RD).
• Internal & external threading capability: In many profiles, the same insert can machine both internal and external threads, reducing tool inventory (exceptions apply: ISO / UN / NPSM / UNJ / Acme).
• NPSF compatibility: Specifically designed to handle NPSF thread forms within the 14–18NPSF range for reliable, repeatable results.

This threading insert is built to streamline production runs and maintenance work alike. The TiAlN coating helps sustain cutting performance under heat, while the dual-edge design minimizes downtime through quick indexing. Five length options and broad compatibility with common thread forms give you a flexible, efficient solution for a variety of machining tasks without juggling multiple inserts.