We can produce hexagon nuts, bolts with large hexagon head, plain washers, and cheese head studs for stud welding. And we can also produce high strength bolts with large hexagon heads, high strength large hexagon nuts and high strength plain washers all for steel structures. The products can be produced by DIN, ISO, ASTM, ANSI, JIS, NF, and other standards. The strength grade can reach 4.8s-10.9s, and the steel structure can reach 8.8s -10.9s. Our products are widely used in the areas of steel structure, bridge, railway, regular boat, car industry, electric power and nucleus engineering items, etc.