product name:recessed hex bolts color:white,black,bright zinc plated,and so on material: stainless steel,iron,and so on. ... -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 ...