Hexagon slotted nuts and castle nuts 1.Standard:DIN,ISO,JIS,AISI 2.Size:M3-M56 3.Material:Steel,SS,Brass Hexagon slotted nuts and castle nutsPicture NameHexagon slotted nuts (DIN937)HS code73181600Materiallow carbon steel; medium carbon steel(1035/1045); Alloy carbon steel;stainless steel;B7 steel,etc.FinishPlain;black; zinc plated(Cr,3+);zinc plated(Cr,6+); hot dipped galvanized; dacromet;nickle ...