Detailed Product Description StandardGB/T799-1988,DIN261, DIN885, DIN186,DIN188,JIS B 1166, ANSI/ASME B18.52Grade8.8,10.9 SizeM6-M48Surface Treatment: Plain, Black, Galvanized with Zinc, HDGMaterialCarbon Steel, Alloy SteelPacking:25KG Per Carton, 50KG Per Gunny Bag, Pallet or according to customers requirements