The 1658607-1 is a 50-position Amplimite D-sub Plug with phosphor bronze, duplex plated gold on mating end, bright tin on termination end, entire contact under plated nickel, tin-plated steel front shell, black thermoplastic (UL94V-0) housing, cover and cable stabilizer. With 4-40 threaded unplated brass inserts. IDC contact termination.