Bolt, Nut, Screw manufacturer / supplier in China, offering 25mm Threaded Steel Ball with Aluminum Sleeves for Usm Haller Component Parts Adapter Universal Balls, Stud Bolt Metal Carbon Steel 10.9 Double End Stud Steel Stud Rod DIN 939 Stainless Steel A2 A4, 304 Stainless Steel Hexagon Socket Point Set Screw, Top Screw, Headless Set Screw and so on.