Hex Bolts, Carriage Bolts, Timber Bolts manufacturer / supplier in China, offering DIN916 Stainless Steel 304 316 A2 A4 Hexagon Socket Set Screws, Galvanized DIN 466 Carbon Steel Zinc Plated HDG Knurled Collar Nuts, Cns4560 Stainless Steel SS304 SS316 A2 A4 Phillips Cross Recessed Countersunk Head Screws and so on.