A terminal assembly is configured to terminate a shielded cable having an inner conductor, an inner insulator surrounding the inner conductor, an outer conductor surrounding the inner insulator, and an outer insulator surrounding the outer conductor. This terminal assembly includes a generally cylindrical outer ferrule formed of a plastic conductive material, i.e. a material that is deformed after stress is removed, and a generally cylindrical inner ferrule formed of an elastic dielectric material i.e. a material that recovers after stress is removed, having a plurality of circumferential grooves defined in an outer surface thereof. At least a portion of the inner ferrule is disposed within the outer ferrule. A portion of the outer conductor is disposed intermediate the inner ferrule and the outer ferrule and is in intimate contact therewith.