... :carbon steel,stainless steel 2.Finish:zinc,black 3.Grade:8.8,10.9,12.9 [ Product Description]Hex bolt PictureNameHex Bolt ... zinc, hot-dip galvanizing, black, dacrometGrade4.8,6.8,8.8,10.8,12.9SizeM3-M80ThreadFull thread,non-full threadPackingless than 25kgs bulk into carton, then ...