5747238-3 is an AMPLIMITE HD-20 subminiature D-sub plug connector designed for PCB mounting applications. This shell size 4 connector features 37 contact positions and is preloaded with size 20 DF posted pin contacts. The connector includes threaded inserts (4-40) for secure mounting hardware and has dimensions of A: 2.729 in (69.32 mm) and B: 2.500 in (63.50 mm). It is designed without boardlocks and is suitable for applications requiring reliable signal connections in industrial and commercial electronic equipment.