10PCS DC-021 DC Power Socket Female Jack Screw Nut Panel Mount Connector DC021 5.5*2.1MM 5.5X2.5 With Waterproof Cap
https://www.vogueparade.com/shopping/EN/5/6/1005003546199374/10pcs-dc-021-dc-power-socket-female-jack-screw-nut-panel-mount-connector-dc021-5521mm-55x25-with-waterproof-cap//