Philmore 3.5mm 1/8"Isolated  Mini  Stereo Female Panel Mount  Headphone Jack ; 70-534 3.5mm, 3-conductor stereo with solder terminals . Chassis or panel mounting. Mounts in 5/16" hole in panels up to 1/8" thick. Plastic body with knurled nut. Approximate size: 3/4" long x 7/16" diameter.