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A cage nut consists of a square nut in a spring steel cage which wraps around the nut. The cage has two wings that when compressed allow the cage to be inserted into the square holes in equipment racks, and when released hold the nut in position behind the hole. The nut is usually slightly loose in the cage to allow for minor adjustments in alignment. Cage nuts are suitable to fit into either square or rectangular holes and eliminate the need for welding, clinching or staking. They are easily installed using pliers to close the ‘ears’ of the cage. Releasing the ‘ears’ allows them to expand and grip the panel with access from only one side of the panel (or blindside). The range we offer is available with metric threads, although we can supply imperial threads upon requests.