Carmex Thread Mills Solid Carbide — Internal Thread, MT7 shank, 5/16 x 18 is a dedicated internal threading solution built for accuracy and efficiency. Designed for shops that need reliable UN-threading capabilities, it delivers consistent results across UNC, UNF, UNEF, and UNS standards.

• Size and thread type: 5/16" diameter with 18 TPI for UNC/UNF/UNEF/UNS internal threads
• Material: Solid carbide construction for enhanced hardness, wear resistance, and long tool life
• Flute count: Multi-flute design (3–5 flutes) to improve cutting efficiency and chip evacuation
• Shank interface: MT7 shank compatibility for broad machine tooling compatibility
• Internal threading focus: Specifically engineered to mill internal threads, offering an alternative to tapping

The MT line of thread mills is purpose-built to streamline threading operations with a cost-conscious approach. The three to five flutes work in harmony to deliver precise thread profiles with stable engagement, helping reduce cycle times and tool wear. This makes the Carmex MT7 5/16 x 18 internal thread mill a practical choice for production runs and repair work alike, where dependable internal threads are essential for fasteners and assemblies.