AMPLIMITE D-sub Connector HD-20 Series Standard PCB Mounting Receptacle Style Headers AMPLIMITE HD-20 standard PCB through hole vertical mounting receptacle styled d-sub headers with a tin plated steel front shell and a black UL 94V-0 polyester GF housing. These AMPLIMITE HD-20 PCB d-sub socket headers are preloaded with phosphor bronze gold plated solder contacts and are available with various mating connector locks options and PCB boardlocks (please see table for details). For mating connectors see stock numbers 718-3871, 409-3315 , 536-9685, 409-3292, 680-7756 , 680-8803 and 536-9714 typically