The 5747843-4 is a 37-position 2-row right-angle posted PCB D-sub Connector with gold-plated phosphor bronze contacts and UL94V-0 rated thermoplastic housing. The Amplimite HD-20 series receptacle supports through-hole PCB mounting style and threaded insert, 4-40 UNC mating connector lock. This stacked PCB connector is members of the complete line of Amplimite D-sub connector family which has been accepted by the electronic industry for their rugged design and ease of application. Stacked connectors add the advantage of reducing overall board real estate normally consumed by individual PCB connectors.