Carmex Carbide Threading Insert - Unified - TiAlN Coated - 40I12UNCarmex Carbide Threading Insert, Unified, TiAlN Coated, model 40I12UN, is a versatile solution designed for machinists who need reliable threading performance across a wide range of profiles. Built for accuracy and durability, this insert family delivers consistent results in both internal and external threading tasks where supported. Model: 40I12UN Unified, TiAlN coated carbide threading insert for broad compatibility and robust wear resistance.