The Carmex MT solid carbide internal thread mill is built for precise UN-family threading in a compact, cost‑efficient package. It’s designed for shops that need reliable internal threads (UNC, UNF, UNEF, UNS) at 5/16-18 with a versatile MT7 shank.

• Material: Solid carbide for outstanding rigidity, wear resistance, and long tool life in demanding machining environments.
• Internal threading: Specifically engineered to mill internal threads in UNC/UNF/UNEF/UNS forms with a 5/16-18 size.
• Thread size: Targeted internal thread dimension of 5/16 inch diameter at 18 TPI for consistent fitment.
• Flute configuration: Multi‑flute geometry (3–5 flutes) optimized for stable cutting, smoother thread formation, and effective chip evacuation.
• Shank type: MT7 shank, ensuring broad compatibility with standard MT7 collets and holders.
• Value proposition: Designed to deliver efficient threading with cost‑effective tooling life, ideal for high‑volume production as well as onsite repairs.

The MT thread mill brings dependable, repeatable internal threads to production runs, prototype work, and repair tasks. Its carbide rigidity and multi‑flute design help achieve clean thread profiles with fewer passes, reducing cycle times and tooling costs. With its MT7 interface, it integrates smoothly into existing equipment while delivering consistent results across UNC, UNF, UNEF, and UNS thread forms. Whether you’re building assemblies, repairing threaded holes, or setting up a repeatable production process, this tool offers a reliable, precise solution for internal threading.