The 745784-4 is a subminiature D-type receptacle connector from TE Connectivity's AMPLIMITE HD-20 series, designed for front metal-shell right-angle posted connector applications with 37 contact positions. It features a steel front shell with tin plating, a 94V-O rated thermoplastic black housing, and fixed female screwlock mounting with threaded inserts for secure installation. The connector utilizes phosphor bronze socket contacts with duplex plating (0.00076 inches gold on mating end and tin-lead on termination end with nickel underplate), brass tin-plated eyelets, and zinc threaded inserts to ensure reliable electrical performance and corrosion resistance. With a post size of 0.026 inches diameter and dimensional specifications of 2.728 inches (69.32 mm) for dimension A and 2.500 inches (63.50 mm) for dimension B, this connector is ideal for high-density applications requiring robust interconnection in industrial electronics, telecommunications, and military equipment where durability and contact reliability are essential.