Carmex Thread Mills Carbide Drill Mill - UN (UNC UNF UNEF UNS) - x 16 - MT7The Carmex MTD Thread Mill combines drilling, chamfering, and threading into a single operation for machinists producing UN thread forms. Built for high volume work, this carbide tool reduces the number of steps required to create internal threads while maintaining reliable surface quality. Single Pass Operation: Drills, chamfers at 45, and mills threads in one continuous cycle, eliminating separate tool changes. Two Fluted Design: Provides stable