... steel standard: DIN ANSI JIS ASTM MOQ:500 Product Namedouble spring washersBrand 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 sizeM3 ...