... bolt Brand Namesun-alpsStandard ModelDIN ANSI JIS ASTMFINISHBlack,Zinc Plated ,HOT GALVANIZED,Cr Cu or Ni PlatedMaterialCarbon Steel,Brass, Stainless steel ... ,Spring steelMaterial Class4.8 6.0 8.8 12.9gradeProduct sizeM4-M48 1/4"-3"packing listIN carton with ... kinds of Anchors, Screws, Bolts and Nuts, other special Architecture parts and Railway Parts. Our main markets ...