The industry standard 2 conductor 1/4" commercial plug with shielded handle plug. The Switchcraft 70 1/4" Mono 2 Conductor Cable Mount Plug has a Nickel Metal Handle with Screw Terminals. It is the proven industry standard phone plug for audio applications as both a guitar plug and speaker plug connector. Beware of imitations! Its shielded handle is recommended for applications where electromagnetic interference and physical abuse may occur and has a 0.687" Diamater.
Switchcraft connectors have set the standard for the audio world since 1946. Their extensive line of quality connectors features cord plug, panel, PC mount, and in-line versions in a variety of sizes, pin configurations, contact materials and housing finishes.