An electrical connector including a mounting flange defining a mounting hole extending therethrough that is configured to receive a threaded fastener and a deformable crush rib extending from the mount flange and surrounding the mounting hole is presented herein. A method of assembling an electrical connector to a panel including the steps of inserting a fastener within a mounting hole of a mounting flange defining the mounting hole extending therethrough and a crush rib surrounding the mounting hole, applying a clamping force to the mounting flange via the fastener, and deforming the crush rib via the clamping force applied by the fastener such that the deformed crush rib at least partially fills a gap between an inner wall of the mounting hole and the fastener is also presented herein.