The TCL Special Cage nut is a fastener composed of two flaps in clip form. A multi-thread square nut is set into the centre of the upper flap which when given the correct torque can give maximum fastening and assembly strength. No special tools are required to mount these nuts, and they can be assembled much more quickly and easily than conventional nuts and costly operations such as tapping, welding or riveting can be avoided. They are normally mounted on the edge of a panel but can also be used in a rectangular mounting hole in the middle of a panel. The use of this nut allows slight adjustment within the mounting hole thereby ensuring correct alignment of the panels.