Allparts Switchcraft® 152B Stereo Long Threaded Jack, Nickel
Long Threaded Barrel Input Jack, Stereo, Switchcraft, with Nut and Washer. Accepts 1/4″ plug, and can be wired mono or stereo. 1/2″-diameter mounting hole, needed and at least 7/16″ wood thickness are required for mounting. Overall length 2″. Chrome. Short post is hot, medium post is for battery, and large post is for ground.