Introducing Carmex MTB Thread Mills — a high-precision, solid carbide internal threading tool built for through-coolant machining. Designed for 5/16-18 UN-family threads (UNC, UNF, UNEF, UNS) with an MT7 shank, these cutters deliver clean, accurate threads in demanding metals while maintaining long tool life.

• Through-Coolant Bore: coolant is delivered through the tool bore to flood the cutting zone, improving chip evacuation and reducing heat buildup for steadier threading.
• Solid Carbide Construction: rigid, wear-resistant cutting edges provide consistent thread profiles and extended tool life across a range of materials, including steel and aluminum.
• UN Thread Compatibility: specifically engineered for 5/16-18 internal threads, supporting UNC, UNF, UNEF, and UNS forms for versatile, precise threading.
• MT7 Shank: robust MT7 interface ensures secure, accurate engagement with compatible milling machines and tooling setups.
• Optimized Flute Geometry: designed to promote efficient chip formation and smooth engagement in through-coolant operations, reducing friction and chatter.
• Reliable Thread Finish: tight tolerances and stable cutting dynamics yield consistent thread finishes and dependable mating with fasteners.

These features translate into practical benefits on the shop floor: faster cycle times through effective chip evacuation, reduced tool wear and fewer tool changes, and higher-quality internal threads that meet demanding assembly requirements. The Carmex MTB Thread Mills are an excellent choice for precision manufacturing environments where through-coolant threading, long tool life, and consistent UNC/UNF/UNEF/UNS performance matter most.