Abstract: A shielding cage with an improved construction is disclosed that permits such cages to be more closely spaced together when a plurality of them are arranged in side-by-side arrays of cages. The cage is formed from a sheet metal blank that is stamped and formed to define sidewalls, top wall, bottom wall and a rear wall. In one embodiment, the ends of the blank are formed with interengaging elements in the form of tabs and slots that interfit within the plane of one of the cage walls, thereby eliminating the need for projections disposed on the sidewalls of the cage.