Bolt, Nut, Customized Fastener manufacturer / supplier in China, offering DIN 7504 Metal Roofing Concrete Wood Cross Recessed Self Drilling Tek Screw, Carbon Steel Hex Bolt Heavy A490 A325 A370 2h Hot Galvanizing Sherardize Heavy Hex Nut, M8 M12 M14 304 Black Oxide Monel Incoloy825 Carbon Steel 304 Ss Stainless Hex Bolt M6 and so on.