... EN ISO 4034,ASME B 18.2.2,BS 4190 and JIS B 1181-19932)Material: Mild Steel,carbon steel,SUS304 ... ,SUS316,alloy steel,copper and so on3)Strength grade:4,5,6,8,104)Size ... )Finish: plain,black,zinc plated,HDG, dacromat and so on6)Packing:Export Packing (Carton/ Pallet).also according to customer`s requirement. Hex Nuts