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By certification 
(1)Standard :DIN6915
(2)Grade: From Class 8 to Class 12.
(3)Sizes: M8-M64
(4)Material: Carbon steel, Alloy Steel, etc
(5)Finished: Black, Zinc, HDG, PTFE, 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.
(2)Grade: From Class 8 to Class 12.
(3)Sizes: M8-M64
(4)Material: Carbon steel, Alloy Steel, etc
(5)Finished: Black, Zinc, HDG, PTFE, 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.
