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By certification 
(1)Standard :DIN931
(2)Grade: 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.
(2)Grade: 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.
