1/4" stereo jack with 9/16-12 threaded exterior. Please note, this jack will not tap its own hole! Our #1518 tap should be used to properly tap 9/16-12 wood threads to accept the jack (1/2" starter hole required).
See details below
Tip (positive) is shortest terminal. Ring (stereo output or battery switch) is mid-length terminal. Ground is the long terminal coming off the side of the jack.