A coupler for a coaxial cable connector includes a nut including an internally threaded portion and an extension portion extending forwardly from the threaded portion; and a grounding cage slidingly coupled with the nut. An inner surface of the extension portion includes an annular groove, the grounding cage includes a rear ring portion disposed in the annular groove and configured to slide in the annular groove, and a forward portion of the grounding cage is configured to extend forwardly beyond a forward end of the nut.