Abstract: Electrical connection element provided with peripherally distributed electrical contacts designed to cooperate with the corresponding contact pins of a plug, a rotary safety disk being provided and having peripheral perforations the number and position of which are chosen, on the one hand, at rest, to conceal the peripheral contacts of the connection element and, on the other hand, be superimposed therewith when the disk driven by the pins of the plug is rotated, whereas sealing blocks are positioned under the safety disk so as to seal off the peripheral perforations thereof in the rest position. The sealing blocks are positioned on a sealing disk also provided with perforations, and which is formed under the safety disk and mounted fixed in terms of rotation and able to move in terms of translation against the action of an elastic arrangement which biases it towards the safety disk.