Carmex Thread Mills Solid Carbide - Fast Type - With Internal Coolant Bore - UN (UNC UNF UNEF UNS) - 1/2 x 13 - MT8Carmex FMT Fast MT solid carbide thread mill is a high efficiency threading tool designed for CNC mills that demand speed, precision, and reliability. This 1 2 x 13 thread mill with an MT8 shank supports UNC, UNF, UNEF, and UNS threads, delivering fast, consistent results across common thread standards. Material: Solid carbide for exceptional rigidity, wear resistance, and long tool life Thread format: UN family (UNC, UNF, UNEF, UNS) with 1 2 x 13