... 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+)6 ... nut; butterfly nut;wing nut;2.StandardDIN934,DIN985,DIN315,DIN1587, ISO,JIS& ANSI,GB ,BS,ASTM,Nonstandard nut (according to your ...