AMPLIMITE HD-20 All-Plastic, 590 Mount Series, Board Mount D-Sub Connectors AMPLIMITE HD-20 590 Series right angle posted PCB mount d-sub plug and socket connectors with black all-plastic 94V-0 rated thermoplastic housings and pre-loaded with size 20 DF posted contacts. These AMPLIMITE HD-20 590 Series plastic d-sub plug and receptacle connectors are available various mounting hardware options and contact platings. Please see table for details.