A coaxial cable connector includes a pin having a plurality of circumferentially spaced support arms, inward facing surfaces of the support arms defining a cavity. A shoulder is provided on the inward facing surfaces. A guide is axially received in the internal cavity, the guide having tabs at one and a radial flange at the other. An elastomeric cylindrical collar is disposed on the guide between the tabs and the flange. In a first position, the collar is axially uncompressed or axially partially compressed between the flange of the guide and the shoulders of the support arms. In a second position, the flange is positioned closer to the shoulders such that the collar is axially compressed between the flange and the shoulders to a shorter axial distance than in the first position and such that the collar is expanded radially outwardly to a greater amount than in the first position.