Cage Nut

Cage Nut

A cage nut or captive nut is a specialized type of nut used in applications where standard nuts are difficult to install. This nut is a combination of a square nut within a spring steel cage which wraps around the nut. The cage has two wings that, when compressed, allow the nut to be inserted into square holes in equipment racks, for example. A cage nut consists of a square or rectangular nut encased in a spring steel cage. The cage often has wings for ease of installation.