Two conductor 1/4" open frame jack ideal for musical instrument and speaker connections. This jack mates with standard 1/4" phone plugs and mounts in a single 3/8" diameter hole. 3/8-32 UNEF-2A threads. I measured .370" diameter on the threads. Threaded portion of bushing measures .275" long. Fender doesn't include a complete set of mounting hardware with this jack but we do; nickel plated lock washer, nickel plated beauty washer and nickel plated hex nut. Brand New. Genuine Fender 0021956049. UPC 717669824006. Photo may not reflect current Fender packaging.