Manual/Spec Sheet WIKIPEDIA Reference Panel mount coax power jack. Plastic housing. Size Designation: B Outer Diameter: 4.0mm Inner Diameter: 1.7mm 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. The jack inserts into the front of the panel, while the lockwasher and locking nut is secured from the back side for a clean look. Voltage Class: EIAJ Class II (3.16 - 6.3 VDC) Additional Model #'s 70-340 340 UPC: 038975483405