Carmex Thread Mills Solid Carbide - With Through Coolant - NPT - 1/4 - 3/8 x 18 - MT7Carmex MTB solid carbide thread mills deliver precise NPT threading with the reliability you expect from a highperformance carbide tool. Built for CNC applications, this MT7shank mill integrates cuttingedge throughcoolant technology to keep chips moving and temperatures down, even in deep or hardtoreach bores. Through Coolant Bore: Delivers coolant directly through the tool to the cutting edges for superior cooling and effortless chip evacuation in