Product Description
MADE IN USA
Mono 2-conductor 1/4" open frame jack with transfer circuit.
Includes nut (3/8"-32 threading) and washer.
Transfer circuit = Two extra lugs that interact with the "hot/tip" lug of the jack. With nothing plugged in, the hot/tip goes through one of the extra lugs (like a 12A). When something is plugged in, it opens/disconnects that lug and closes/connects to the alternative lug. See alternate photos for details.
Used in some Fender products. Equivalent part number: 0041701000