... :all sizematerial:carbon steel,stainless steelcolor:zinc plated,black,plainpackage:bulk in cartonOur main products are bolts, screws, nuts, ... , brass or other special materials. For finishing, we provide black oxide, zinc electroplating, phosphate, copper plating, mechanical galvanization, ... our international market shares. If you are interested in cooperating with us or our products, please don' ...