Carmex Thread Mills Solid Carbide - Internal Thread - UN (UNC UNF UNEF UNS) - 9/16 x 12 - MT7The Carmex solid carbide thread mill delivers precise internal UN thread cutting for machinists working with UNC, UNF, UNEF, and UNS standards in the 9 16 x 12 size. Its MT7 grade construction supports consistent results in demanding production environments. Material: Solid carbide body maintains edge strength and dimensional stability during extended threading cycles. Thread Standard: Compatible with internal UN thread forms including UNC, UNF, UNEF,