Bolt, Nut, Customized Fastener manufacturer / supplier in China, offering ASTM A574 Socket Head Bolts (SKT) 5/16-18uncx2-1/4" Gr8 Skthd Cap Screw, DIN 912 Stainless Steel A2 Titanium Socket Cap Screw M20 X 160/55 2.50 PT, 8.8 Black Oxide ISO4762 DIN912 Wrench Bolt M16X55 Hex Head Socket Screws and so on.