_x000D_ These are internally threaded and counterbored tubular rivets that can be anchored entirely from one side. With an open end, barrel-shaped flange and protruding boss that is internally threaded, this flat head rivet nut ensures a good performance of fastening. The boss sits within the components being fastened, the flange provides the bearing surface. _x000D_ _x000D_ _x000D_ Features: _x000D_ Made from zinc plated carbon steel which provides strength, corrosion protection and long service life. _x000D_ 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. _x000D_ Convenient to install, designed to form a bulge on the back side of the panel as a screw is tightened in its threads. _x000D_ There are seven different sizes from M3 to M12 that you can choose as needed for various purposes. _x000D_ Each set includes many pieces of rivet nuts so you don't have to go to hardware store searching rivet nuts for a while. _x000D_ _x000D_ _x000D_ Specifications: _x000D_ Material: Carbon steel _x000D_ Surface Finishing: Zinc plating _x000D_ _x000D_ Color: As pictures show _x000D_ Type: Flat head rivet nuts _x000D_ Size and Quantity(Optional): _x000D_ M3 100pcs_x000D_ _x000D_ M4 100pcs _x000D_ M5 100pcs _x000D_ M6 100pcs _x000D_ M8 20pcs _x000D_ M10 20pcs _x000D_ M12 20pcs_x000D_ _x000D_ _x000D_ _x000D_ Package Included: _x000D_ 1set x Rivet Nuts