Made from durable iron, these Flat Head Flange Rivet Nuts provide a strong and reliable threaded fixing point in metal materials where access is available from only one side. The protruding end of the barrel-shaped rivet comes with internal threading, which provides a robust fastening action. Available in M4, M5, M6, M8, and M10 sizes, they are ideal for machinery, automotive applications, fabrication work, repairs, and a wide range of hardware projects.