Carmex Thread Mills Mini Type - For Hard Materials - UN (UNC UNF UNEF UNS) - No. 6 x 32 - MT9Carmex Thread Mills Mini Type are solid carbide tools engineered to cut internal threads in hardened materials, delivering high performance with an improved cut and an excellent surface finish. Designed for machinists and shops that work with hard steels and alloys, these mini thread mills excel in restricted spaces and precise applications. No. 6 x 32 thread size: Internal thread milling compatible with UN, UNC, UNF, UNEF, and UNS thread forms. Mini