Speed-grip cage nuts are an assembly of a square nut and spring steel cage. They are used throughout all industries where panels are assembled via mechanical fasteners. They can be assembled by hand without special tools, which speeds up the assembly process. Once installed, the fastener is hidden but the head of the screw is visible, making this a serviceable joint.
For more information about cage nuts for industrial applications: https://www.araymond-industrial.com/solutions-standards