Meet the Carmex Carbide Threading Insert in NPSF format, TiAlN coated and precision-engineered for professionals who demand reliable performance across common thread profiles. Model 40-8NPSF fits a busy workshop where versatility and durability matter.

• Five length options: available in five lengths (from 12 mm to 40 mm) to match a wide range of thread profiles and turning depths, with pitches from 0.5 mm / 32 TPI up to 6.0 mm / 4 TPI depending on length.
• TiAlN coating: carbide insert finished with TiAlN for enhanced hardness, wear resistance, and temperature tolerance, helping extend tool life in tougher materials and higher-speed applications.
• Double-edged design: each insert provides two cutting edges for extended usable life; flip or rotate to extend service before replacing (note: BSPT / NPT / NPTF / American Buttress / API RD are exceptions).
• Internal and external threading capable: for many thread profiles, the same insert can machine both internal and external threads, reducing tool changes and simplifying setup (exceptions apply for ISO / UN / NPSM / UNJ / Acme).
• Versatile, single-set coverage: designed to cover a broad range of common thread profiles with a single family of inserts, helping you minimize inventory while maximizing productivity.

This insert is ideal for machinists and shops that regularly produce diverse threaded components. The combination of TiAlN coating, dual cutting edges, and multi-length availability delivers dependable performance across standard metric and imperial thread forms, while reducing downtime and tool changes. Use it for general-purpose threading tasks on a variety of materials, from metric to inch-based threads, and rely on its robust carbide construction to maintain precision through repeated operations.