(1)Standard :DIN931 (2)Grade: 4.8, 8.8, 10.9, 12.9, 5, 8. (3)Size: M6-M80, 1/4"-3". (4)Material: Carbon Steel, Alloy Steel. (5)Finish:plain,zinc,zinc yellow,black,HDG,etc. (6)Packing: 1.less than 25kgs bulk into carton, then packed on pallet 2.Small box or color box, then into carton, then packed on pallet 3.As customers' request. (7)Payment terms: T/T, L/C, Western Union.