... ~M80 1.What’s the specification of our Hex Flange metal Lock Nut? 1.NameCarbon steel zinc plated hex ... flange metal lock nut2.standardASTM,DIN,ISO,BS,AS,JIS ... etc3.MaterialCarbon Steel4.GradeDIN,ISO:4,5,6,8,10etc;SAE:A,2,5,8;etc5.FinishZinc plated(Cr,3+) ... Alloy carbon steel;stainless steel,etc.4.GradeDIN:4-12: SAE GR.A-GR.85.FinishPlain;black; zinc plated(Cr,3 ...