M3-M12 Rivet Nut Set，190Pcs Plated Carbon Steel Flat Threaded Rivet Nut，Flange Rivnut Nutsert Fastener Repair Tool Accessory

Made from zinc plated carbon steel which provides strength, corrosion and long service life. With open end, small flange, round hole, threaded inner wall and partial anti-skid surface, this flat head rivet nut has a good performance as fastener. Convenient to install, designed to form a bulge on the back side of the panel as a screw is tightened in its threads. There are seven different sizes from M3 to M12 that you can choose as needed for various purposes. Each set includes many pieces of rivet nuts so you don't have to go to hardware store searching rivet nuts for a while.