Carmex Thread Mills Solid Carbide - For Aluminium - UN (UNC UNF UNEF UNS) - 9/16 - 5/8, 1 1/8 - 1 5/8 x 18 - UnCoatedEngineered for precision aluminum threading, the Carmex AMT Solid Carbide Thread Mill delivers reliable, high speed performance for machinists and job shops that demand clean, accurate internal threads in UN family forms (UNC, UNF, UNEF, UNS). Designed to handle aluminums unique cutting dynamics, this tool harmonizes rigidity, heat resistance, and efficient chip evacuation for consistent results even in demanding production environments. Thread form