Bolt, Nut, Screw manufacturer / supplier in China, offering 12.9 Level Concave End DIN 916 Hexagon Stainless Top Screw and Headless Stop Screw GB80, DIN 15237 Belt Screws Bolt Elevator Bucket Carbon Steel Elevator Bolt Sets, Fastener Single and Double End Threaded Stainless M8X50 Threaded Rods 6000 mm and so on.