Abstract: Modular cabinetry is provided comprising a plurality of interchangeably stackable cabinet units and at least one coupling member for restricting relative shifting of adjacent stacked units. Each cabinet unit includes at least one upwardly projecting top flange and at least one downwardly projecting bottom flange such that adjacent stacked units present a set of cooperating flanges comprising a bottom flange of the upper unit and a top flange of the lower unit. The coupling member includes a pair of oppositely facing grooves for receiving the set of flanges when the member is interposed between stacked units.