AMPLIMITE D-sub Connector, HD-20 Series Standard PCB Mounting Plug Style Headers AMPLIMITE HD-20 standard PCB through hole vertical mounting plug style d-sub header connectors with a tin plated steel shell, black polyester GF housings and front steel shell. These AMPLIMITE HD-20 PCB plug style d-sub header connectors have gold plated phosphor bronze contacts, grounding indents and straps. There are various mating connector locking options for these HD-20 standard PCB d-sub connectors and versions are available with PCB boardlocks, please refer to table for selection details. For mating connectors see stock numbers 680-7762, 536-9736 and 409-3337 typically.