A seal member disposed within a coaxial cable connector comprising an annular body portion having an outer diameter surface and an inner diameter surface, and a plurality of flexible segments disposed along the inner diameter surface, extending radially inward from the inner diameter surface, wherein the flexible segments are configured to conform to a helical outer conductor and fill a valley of the helical outer conductor, thereby effectuating an environmental seal around the helical outer conductor is provided. A coaxial cable including the seal member is also provided. An associated method is further provided.