200SETS/LOT Plastic Binding Corrugated in button screw Nylon stationary Lock Button Hand Twisted Rivet Studs Description and Specification: Head type: Slotted arc double heads Material: Plastic Size: Head Diameter 15mm Male screw thread: M5 Male thread Length: 6/8/10/15/20/30MM All sizes for elective Female screw diameter: 7MM Quantity: 200PCS/LOT Sample Images: