Abstract: A microwave guide interface extends between a rear surface of a microwave antenna reflector and a facing surface of a base plate. An interconnect member having a ball surface extends rearwardly from the rear of the reflector. A second interconnect member having a ball-receiving socket extends forwardly from a facing surface of the base plate. A spring clamp is attached to a periphery of the base plate and includes a yoke coacting with a strike hook on a circular rib or on separate lugs extending from the rear of the reflector for cinching up the socket into abutting contact with the mating ball surface. A peripheral O-ring extends between peripheral surfaces of the members allows tilting of the assembly such that assembly and alignment can be made over a fairly wide range of angular tolerances of the base plate and reflector.