Carmex Thread Mills Solid Carbide - Fast Type - For Hard Materials - UN (UNC UNF UNEF UNS) - No. 4 x 40 - MT3 M&D Its combination of precise rib

Its combination of precise rib contouring

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

This JBO thread plug gauge helps your team maintain strict thread quality

The VORTEX Carbide Drill Through Coolant is a purpose-built tool for professionals who need reliable

The rugged hardened-steel construction minimizes tool replacement and downtime

Carmex Thread Mills Solid Carbide - Fast Type - For Hard Materials - UN (UNC UNF UNEF UNS) - No. 4 x 40 - MT3 M&D Its combination of precise ribThe 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