Carmex Thread Mills Solid Carbide - With Through Coolant - UNJ (UNJC UNJF UNJEF UNJS) - 9/16 x 12 - MT7The Carmex MTB Solid Carbide Thread Mill with Through Coolant is a high precision threading tool designed for UNJ forms (UNJC, UNJF, UNJEF, UNJS). Built for demanding machining environments, it delivers cleaner threads and longer tool life through an integrated through bore coolant system. Through Coolant Bore: Coolant is delivered directly through the bore to enhance chip evacuation and cooling, helping maintain thread integrity and reduce heat