product name:recessed hex bolts color:white,black,bright zinc plated,and so on material: stainless steel,iron,and so ... : SCM435,10B21Specification& gaugeM0.8-M10 Surface FinishingZn- Plated,Ni-plated,Passivated,Tin-plated,Sandblast and Anodize,Chromate, Polish,Electro Painting,Black ... Anodize,Plain,Chrome plated,Hot Deep Galvanize(H. D. G. ) etc. Heat ...