5747301-7 is an HD-20 AMPLIMITE subminiature D connector plug designed for PCB mounting applications. This shell size 4 connector features 37 contact positions with straight posted contacts and is equipped with 4-40 threaded inserts for secure mounting. The connector has dimensions of 2.732 inches (69.39 mm) for dimension A and 2.500 inches (63.50 mm) for dimension B, with a post length of 0.125 inches (3.18 mm) suitable for PCB thicknesses of 0.062-0.093 inches (1.58-2.36 mm). Contact plating code A indicates phosphor bronze contacts with 0.000030 inch (0.00076 mm) gold on the mating end and tin on the termination end, with 0.000050 inch (0.00127 mm) minimum nickel underplating. This connector is commonly used in data communication, instrumentation, and industrial control applications requiring reliable high-density interconnections.