Meet the Carmex MT7 solid carbide internal thread mill — a precision threading solution built for CNC milling of UN-series holes. Designed for shops that need reliable internal threading with lower tooling costs, it delivers consistent performance in a compact, easy-to-use tool.

• Tool Type: Solid carbide internal thread mill for UNC/UNF/UNEF/UNS threads
• Thread Compatibility: Precisely cuts internal UNC, UNF, UNEF, and UNS threads
• Size: 9/16" diameter with 12 threads per inch (9/16 x 12)
• Flute Count: 3–5 flutes to balance cutting stability and efficient chip evacuation
• Shank: MT7 shank for secure seating in standard milling setups
• Material: Solid carbide construction for high wear resistance and long tool life
• Design Focus: MT line emphasizes efficient, cost-effective threading solutions

The MT7 internal thread mill enables clean, accurate threads without the need for tapping, reducing setup time and potential misalignment. The 3–5 flute geometry enhances stability during entry and exit, delivering consistent thread forms in UN-series holes. Built from solid carbide, this tool offers excellent wear resistance for production runs and demanding applications, helping you extend tool life and maintain tight tolerances. With a 9/16" diameter and 12 TPI thread pitch, it covers common UNC/UNF thread sizes found in mechanical assemblies, automotive components, and industrial equipment. The MT7 shank integrates smoothly with typical milling machines, making it a practical choice for both prototyping and high-volume work.