Detailed Product Description StandardGB/T6177, DIN6923, JIS B1190, IFID21Grade6,8,10 SizeM6-M30Surface Treatment: Plain, Black, Galvanized with Zinc, HDG MaterialCarbon Steel, Alloy Steel, Stainless SteelPacking:25KG Per Carton, 50KG Per Gunny Bag, Pallet or according to customers requirements