Feature:A Rivet Nut fastener is a tubular rivet with internal threads.The material is too thin to machine the thread.It requires a tool or device to install in seconds from one side of the work. The added benefit of not only being a dependable fastener, but they are also ready to use with clean threads available for screw attachments.Specification:Material: Finish: Thread Size: Drill Hole Size (+/-0.1): Total Size: