The 745781-4 is an AMPLIMITE Subminiature D-type receptacle connector designed for HD-20 front metal-shell right-angle posted connector applications. This 9-position connector features threaded inserts and boardlocks for secure mounting, with a shell size of 1 and dimensions of 1.213 inches (30.81 mm) for dimension A and 0.984 inches (24.99 mm) for dimension B. The connector utilizes phosphor bronze socket contacts with duplex plating (contact finish code A: 0.00003 inches [0.00076 mm] gold on mating end with tin-lead on termination end and nickel underplate), a steel tin-plated front shell, and a 94V-O rated thermoplastic black housing. The post size is 0.026 inches (0.66 mm) diameter, and the mating face dimension is 0.375 ± 0.010 inches (9.53 ± 0.25 mm). This connector is ideal for applications requiring reliable subminiature D-type connections with enhanced mechanical stability through threaded inserts and boardlock features.