Countersunk head bolt Standard ASME, ASTM, IFI, JIS, AS, DIN, ANSI Material Low ... ,Zinc Plated ,HOT GALVANIZED,Cr Cu or Ni PlatedMaterialCarbon Steel,Brass, Stainless steel,Spring steelMaterial Class4.8 6.0 8.8 ... "-3"packing listIN carton with palletsDelivery Lead Time30-45 days high quality countersunk head bolt