a usb plug receptacle includes a connector substrate having a tongue portion having a first set of electrical contact pins disposed on a top surface of the tongue portion , a second set of a plurality of electrical pins disposed on a bottom surface of the tongue portion , a third set of electrical contact pins disposed on an opposite end of the tongue portion . the usb plug receptacle further includes a metal case made of a sheet of electrically conductive metal plate by blanking the sheet into a generally tubular shape to receive and enclose the connector substrate . when the connector substrate is inserted into the metal case , the third set of electrical contact pins are exposed outside of the metal case and the third set of electrical contact pins can be mounted on first and second sets of electrical contact pads of a printed circuit board assembly .