Disclosed herein is an electrical connector for use with an underwater electrical device. The underwater electrical device is connected to a source, such as a power source, by electrical wiring. The connector is adapted for connecting the source and the underwater electrical device without compromising the integrity of the electrical connection despite expected movement and considerable torsional forces being exerted upon the connection so made. In an exemplary embodiment, the electrical device includes internal screw threads. The connector includes an insertion member for retaining the electrical wiring. The insertion member is elastic and deformable. The connector further includes a clamping member having an external screw for compatible engagement of the electrical device internal screw threads. Finally, the connector includes a sealing member for creating a leak proof seal between the connector and the electrical device. The insertion, sealing and clamping members are sized and shaped for compression upon the full engagement of the screw threads of the respective elements, thereby providing a leak proof seal.