This 1/4-inch (6.35mm) double circuit mono jack is designed for chassis mounting in radio equipment, amplifiers, and audio testing apparatus. Built with high-grade phenolic insulation wafers and sturdy nickel-plated spring contacts, it ensures firm plug retention and reliable switching.

The jack mounts into a standard 5/16-inch (7.94mm) chassis hole using its integrated threaded front bushing. Double circuit contact points allow for automatically opening or closing secondary circuits when a plug is inserted, making it ideal for headphone cut-off switches, speaker overrides, and signal routing.