... 12.9 grade SpecificationProduct Name Nut hexagon for gearbox with zinc platedBrand NameWDStandard ModelDIN ANSI JIS ASTMFINISHBlack,Zinc Plated ... ,HOT GALVANIZED,Cr Cu or Ni PlatedMaterialCarbon Steel,Brass, Stainless steel,Spring steel, Alloy ... sizeM3-M64 1/4"-3"packing listIN carton with palletsDelivery Lead Time30-45days Nut hexagon for gear box with zinc plated