TNP Banana Jack Keystone Insert (5 Pack) – Speaker Banana Connector Socket Female Port Screw Type Binding Post Snap in Adapter Inline Coupler for Wall Plate Outlet Panel (White)

A keystone module is a standardized snap-in package for mounting a variety of low-voltage electrical jacks or optical connectors into a keystone wall plate, face plate, surface-mount box, or a patch panel. Keystone modules have a rectangular face of 14.5 mm wide by 16.0 mm high and are held in place with flexible tabs. This allows them to be snapped into a mounting plate with correspondingly-sized rectangular holes, called ports.
A banana connector (commonly banana plug for the male, banana socket or banana jack for the female) is a single-wire (one conductor) electrical connector used for joining wires to equipment. The term 4 mm connector is also used, although not all banana connectors will mate with 4 mm parts. The plug is typically a four-leafed spring tip that fits snugly into the jack. The plugs are frequently used to terminate patch cords for electronic test equipment. They are also often used as the plugs on the cables connecting the amplifier to the loudspeakers in hi-fi sound systems.