Carmex Thread Mills Solid Carbide - Fast Type - For Hard Materials - UN (UNC UNF UNEF UNS) - No. 4 x 40 - MT3 M&D Built for mold and die

Built for mold and die machining below 55 HRc

medium class tolerance: Specifically matched to standard BSF right‑hand threads with a balanced tolerance for repeatable

including pre‑hardened steels and similar alloys below 55 HRc

helping you finish parts quicker with consistent results

Its combination of precise rib contouring

Carmex Thread Mills Solid Carbide - Fast Type - For Hard Materials - UN (UNC UNF UNEF UNS) - No. 4 x 40 - MT3 M&D Built for mold and dieThe Carmex FSH Thread Mills are high performance solid carbide tools designed for fast, precise thread milling in hard materials. Sized No. 4 x 40 with MT3 shank, theyre built for engineers and machinists who demand reliable UNC UNF UNEF UNS thread forms in hardened alloys up to 65 HRC. Thread size and standard: No. 4 x 40 thread, compatible with UNC, UNF, UNEF, and UNS thread forms for versatile threading in a single toolpath. Shank size: MT3 shank