Carmex Thread Mills Solid Carbide - With Through Coolant - UN (UNC UNF UNEF UNS) - 1/2 x 13 - MT7The Carmex MTB Solid Carbide Thread Mill with Through Coolant is built for professionals who need clean, accurate internal threads in tight bores. Designed for UNC UNF UNE F UNS thread forms and a 1 2" diameter, 13 TPI, this MT7 shank tool delivers reliable performance in demanding machining environments. Through Coolant Bore: Delivers coolant directly to the cutting edges to improve chip evacuation and thermal control, extending tool life. Solid