Carmex Thread Mills Solid Carbide - With Through Coolant - MJ - MJ 4 x 0.7 - MT7Carmex MJ through coolant thread mill is a precision solid carbide tool designed for clean, accurate internal threading in metal parts. Sized MJ 4 x 0. 7 with an MT7 shank, it delivers efficient chip evacuation and durable performance in demanding applications. Diameter x pitch: 4 mm diameter with 0. 7 mm thread pitch Shank: MT7 for secure, standard toolholding Through coolant: coolant runs through the bore to flush chips and cool the cutting edge