The BU-P2142 is a 10-pack of Mueller's miniature, panel mount banana jack that accepts mini banana plugs. Can be mounted to panels up to 0.25" (6.35mm) thick using a 0.25" (6.35mm) hole.
The BU-P2269 is a panel mount dual banana jack with posts spaced at the industry standard 0.75" (19.05mm) center-to-center. Can be mounted to panels up to 0.25" thick.
The BU-P3277 is a miniature, rivet-type 3mm banana jack with a turret. Mountable to panels up to 1/16" (1.58mm) thick. Accepts miniature, 3mm banana plugs.