A connector assembly includes a center contact configured to be terminated to a center conductor of a cable. A dielectric holds the center contact. An outer contact surrounds the dielectric and the center contact. The outer contact has a mating segment extending from a mating end, a terminating segment extending from a cable end, and a middle segment between the mating and terminating segments. The terminating segment is configured to be terminated to a braid of the cable. The middle segment has a diameter that is less than the respective diameters of the mating and terminating segments. A cavity insert surrounds the middle segment of the outer contact. The cavity insert includes a receiving shell and a closing shell that are joined together at an interface.