Abstract: A mezzanine connector assembly includes connectors engageable to a mating connector assembly such as a motherboard. It includes a circuit card having a surface on which a connector is mounted as well as a mezzanine card having a surface on which another connector is mounted. A mounting member is attached for connection between the cards in order to establish relative positions of the card surfaces. The distance between the card surfaces is set at least in part by the distance between end portions of the mounting member. The distance between the card surfaces is independent of the thickness of the cards so that a variation of the thickness of the cards will not result in a variation of the distance between the card surfaces.