Data Sheet WIKIPEDIA Reference Panel mount coax power jack. Plastic housing. Size D: 5.5/3.3/1mmPin This is an isolated jack, meaning the outer barrel of the plug is not electrically connected to the chassis that the jack is mounted to. This jack inserts into the front of the panel, while the locking nut is secured from the back side for a clean look. Mounting hole: 0.53 inch Voltage Class: EIAJ Class IV (10.6 - 13.5 VDC) This jack is a bit different in that it does not have a pin, but has a hole in it to receive the mating plug's pin. Additional Model #'s 70-355 355 UPC: 038975483559