MX35F-TB is a 3.5mm Female Solderless Panel mount connector
The MX35F-TB fits 1/2 Diameter hole. It can be used to mount on a panel or wall-plate or alone, by itself. It provides you with a simple solution to terminate a stereo or mono audio cable to a female 3.5mm connector.
The connector has a female 3.5mm connector on one end a miniature terminal block on the other end; you simply insert the stripped wires into the terminal block and tighten the screws.