Cage Nut Cage Nut is used for electronic cabinets and is also used in other industrial application. Our offered nut is used as internal connectors for metal structure. This nut is can be used in difficult installation conditions and tight spaces. The provided nut has wing that assist with the bolt insertion by holding the nut stationary in a square hole. Made from mild steel, the offered Cage Nut can be availed from us in minimum quantity order as per the client's needs.