Crimp Receptacle Contacts for DF20 Series Socket Connector. Crimp receptacle contacts for use with DF20 series socket connectors. These crimp socket contacts are made from gold plated phosphor bronze and are available in two sizes: stock number ; 685-0757 685-0757 is for wire sizes 28-30 AWG and stock number ; 779-4761 779-4761 is for wire sizes 30-32 AWG.