: the flat blind rivet nuts are made of high quality material. The stainless steel has high strength and provides good resistance in bad environments such as high temperature, cold and high humidity surfaces. They have superior rust resistance and excellent oxidation resistance, which can a long time. With open end, small flange, round hole, winded inner wall and partial anti-skid , this flat rivet nut has good performance of the fastening function. thread: our screw thread is very , clean and precise. And the compact thread is not easily out of shape and glide into the process of rolling. Our nuts and bolts comply with the standardised metric system. Other application: stainless steel blind rivet nut sets are perfect for , amateurs, landlords, craftsmen, repair men, women, woodworking, construction, plumbing, HVAC and so on. They have also worked well for 3D printed projects. Use on sheet metal and wood. Fastener type:Rivet colour:Silver Material:stainless steel Package Contents: 100 x Flat Blind Rivet Nuts(M5) Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.