The Carmex Carbide Threading Insert 21E11UN is a unified, TiAlN-coated solution built for machinists who demand reliable, versatile threading across the most common profiles. Designed to handle internal and external threads with precision, it’s a practical choice for mixed-production environments.

• Five length options: available in 12 mm to 40 mm lengths to suit different reach and rigidity requirements.
• Wide pitch range: supports pitches from 0.5 mm / 32 TPI up to 6.0 mm / 4 TPI, depending on the chosen length.
• TiAlN-coated carbide: enhanced wear resistance and heat tolerance for longer tool life and consistent cutting performance.
• Double-sided cutting edges: two usable edges on most inserts, reducing downtime between changes (exceptions apply for BSPT/NPT/NPTF/American Buttress/API RD).
• Internal & external threading capability: for many profiles, a single insert can machine both internal and external threads, streamlining setup and inventory (with exceptions like ISO/UN/NPSM/UNJ/Acme).
• Unified threading coverage: designed to cover a broad range of common thread profiles with a single, interchangeable insert family.

With its TiAlN-coated carbide construction, this insert delivers steady performance across materials and speeds, helping you maintain accurate thread forms while reducing tool changes. The unified design simplifies stocking and reduces complexity on the shop floor, while the five-length range gives you the flexibility to choose the right balance of reach, rigidity, and engagement for each job. Ideal for high-mix shops that require dependable threading without juggling multiple dedicated inserts.