Carmex Thread Mills Mini Type - For Hard Materials - UN (UNC UNF UNEF UNS) - No. 5, No. 6 x 40 - MT9Carmex Thread Mills Mini Type are precision solid carbide tools engineered for threading hard materials. Designed for engineers and machinists who demand reliability in tight spaces, they deliver high performance cutting and an excellent surface finish on hardened workpieces. Tool material: Solid carbide construction for exceptional hardness, wear resistance, and long tool life in demanding applications Threading standards: Compatible with UN, UNC,