A coaxial connector assembly has a housing with at least one contact receiving cavity which extends from a mating end to a contact assembly receiving end. The contact receiving cavity has a mounting section proximate the contact assembly receiving end. A contact assembly is positioned in the contact receiving cavity. The contact assembly has a front flange proximate a mating portion of the contact assembly. A positioning member is inserted on the mating portion of the contact assembly. The positioning member cooperates with the flange to position the positioning member on the mating portion of the contact assembly. The positioning member cooperates with a wall of the contact receiving cavity to limit the movement of the mating portion of the contact assembly in a direction which is transverse to a longitudinal axis of the contact assembly.