Abstract: A circular electric connector including a socket extending along an axis and provided at an axial end with cavities, and a sealing grommet provided on the axial end defining a front face through which electric elements may be inserted in the cavities and a circumferential wall, the connector additionally including a housing wherein the socket is housed, the housing including an attachment device for attachment with a backshell, the connector including a retaining ring around the circumferential wall of the grommet, the retaining ring being adapted to limit the expansion of the diameter of the grommet when the electric elements are inserted through the grommet. A connection may be made with such a connector and a known or modified backshell.