A coupling nut for an electrical connector connectable to an electrical cable having an outer conductor surrounded by a jacket. The coupling nut formed as a cylindrical body with a bore extending between a cable end and a connector end. An annular wedge groove in the bore sidewall proximate the cable end with an angled wedge surface extending from the bore sidewall at a cable end side to a bottom diameter within the wedge groove. A snap ring retained in the wedge groove, an inner surface of the snap ring provided with a gripping feature.