Bolt, Nut manufacturer / supplier in China, offering Factory Sales Customized Metric Grade 4.8 8.8 10.9 Zinc Customized Hex Hexagon Bolt Screw (DIN931 DIN933), Round Hole Galvanized Iron Plate Embedded Parts Steel Plate Steel Pipe Base Welded Four-Hole Column Steel Structure, High Quality Galvanized Steel Thick Galvanized Steel Sheet Thick Hot DIP Galvanized Steel Sizes Galvanized Sheet Metal Roll and so on.