Carmex Thread Mills Solid Carbide - Internal & External Thread - NPT - 1/16, 1/8 x 27 - MT7Carmex MT Line Thread Mills in solid carbide deliver precise internal and external NPT threading in a compact, cost efficient package. Designed for machinists and job shops, these MT7 thread milling tools streamline production by handling both sides of the thread in a single tool. Tool Type: Thread mill capable of creating both internal and external NPT threads with a single tool, reducing setup and tool changes. Material: Solid carbide for high