Suzhou TCCA co., ltd. mainly sells standard and non-standard fasteners of various materials. we can provide different national standards products such as ?GB, ASME, DIN, UNI, BSW, ISO and so on.?According to customer requirements or customer special purpose, the surface of products can be treated: white zinc, color zinc, blackening, black phosphorus, copper plating, black zinc, nickel plating, electrophoresis, dacromet, hot dip galvanized, mechanical galvanized.