AMPLIMITE D-Sub Connector, HDP-20 Series, Shielded Plug and Receptacle Kits AMPLIMITE HDP-20 series, unassembled shielded d-sub connector Plug and Receptacle kits consisting of a d-sub connector with a full metal tin over copper plated steel shell and black polyester GF nylon insert preloaded with gold flash plated contacts, 2 x nickel over copper plated zinc backshells, 2 x 4-40 mounting screws, 2 x 4-40 hex nuts and 2 x 4-40 filister head screws.