... :Mechanical strength: 4.8-12.9 grade Specification Product Name Machine Screws Brand NameWDStandard ModelDIN ANSI JIS ASTMFINISHBlack,Zinc Plated ,HOT ... GALVANIZED,Cr Cu or Ni PlatedMaterialCarbon Steel,Brass, Stainless steel,Spring steel, Alloy steelMaterial Class4.8 6.0 8.8 12 ... /4"-3"packing listIN carton with palletsDelivery Lead Time30-45days Machine Screws