Iscar MTECB 0250C04 20UN IC908 1/4in 20TPI Carbide Thread Mill

This is a new Iscar MTECB 0250C04 20UN 908 solid carbide thread mill made in Israel, part of Iscar's Multi-Master exchangeable-head system, as evidenced by the threaded shank connection visible in the photos. The part number decodes as follows: MTECB = Multi-Master thread milling head with through-coolant, cylindrical profile, bottom cutting capability; 0250 = 0.250 inch (1/4 inch) cutting diameter; C04 = 4 flutes; 20UN = 20 threads per inch, Unified National thread form; 908 = IC908 carbide grade, a PVD-coated (TiAlN-based) submicron carbide substrate designed for hardened steels, stainless steels, and high-temperature alloys. The IC908 grade provides high wear resistance and toughness, making it suitable for full-profile thread milling of 1/4-20 UN threads in a variety of ferrous and exotic materials on CNC machining centers. This head mounts directly onto compatible Iscar Multi-Master shanks and does not require a dedicated holder beyond the MM shank system.

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