Non-Standard Metal Parts manufacturer / supplier in China, offering Hot DIP Galvanization/Carbon Steel Heavy Hex Structural Bolts ASTM A325, High Strength 10.9 Grade Galvanized Flange Bolt and Nut Combination Set Yellow Zinc Fine Tooth Flange Bolt, Factory Direct Supply Heavy Hex Structural Bolts ASTM A490/ASTM A325 and so on.