Hex bolts with black zinc plated 1,Products DetailesMaterial1.Stainless Steel: SS201, SS303, SS304, ... ,Passivated,Tin-plated,Sandblast and Anodize,Chromate, Polish,Electro Painting,Black Anodize,Plain,Chrome plated,Hot Deep Galvanize(H. D. G ... 8,We are the best Choice for yr Hex bolts with black zinc plated