Bolt, Nut, Customized Fastener manufacturer / supplier in China, offering M6*20 DIN 6921 Carbon Steel Grade 8.8 Zinc M8 M10 M12 M14 M16 Yellow Zinc Plated Notched Serrated High Tensile Hex Flange Bolt, 8.8 10.9 12.9 Carbon Steel DIN6921 Full Thread M6-M28 Zinc Coating Galvanized Hex Flange Bolt, DIN6921 M14-1.25 M12-1.25 Nylon Patch Black Carbon Steel Grade12.9 10.9 Blue White Zinc Hex Flange Bolt and so on.