DC-022 5.5mm x 2.1mm DC Power Female Socket Connector 5.5*2.5mm DC Jack Panel Mounting Interface Supply Jack Plug Adapter
https://www.vogueparade.com/shopping/EN/4003/1/1005003719014773/dc-022-55mm-x-21mm-dc-power-female-socket-connector-5525mm-dc-jack-panel-mounting-interface-supply-jack-plug-adapter//