... Nuts; 2.Meterial:Carbon steel; 3.Finish:Zinc plated; 4.Size:M3~M80;1/4"~3-1/4"; 1. ... Hex Nut? 1.NameZinc Plated Hexagon Nuts2.standardDIN,ASTM3.MaterialCarbon Steel4.Grade4,5,6,8,10,etc.5.FinishZinc plated6.Size M3~M80 ... .85.FinishPlain;black; zinc plated(Cr,3+);zinc plated(Cr,6+); hot dipped galvanized; dacromet;nickle plated;cadmium plated,etc.6.SizeM3-M80;7 ...