Bolts, nuts, expansion bolts manufacturer / supplier in China, offering All Sizes M6 M8 M10 M20 DIN 6921 Stainless Steel Hex Flange Bolt, High-Strength Zinc-Plated Hex Flange Bolt DIN Standard for Automotive Industry Applications, Grade 4.8 8.8 10.9 12.9 Galvanized Steel Nylon Patch Hex Flange Bolt and so on.