Flat gasket Flat Washers Din9021 Material: Mild Steel, Stainless Steel, Brass Finish: Plain, ZP, HDG package:According Flat gasketDIN9021:carbon steel,middle carbon steel 45#50#,stainless steel ss304,ss316 size:M2-M80 surface treatment:Z.P/HDG/black flat washer material:carbon steel,middle carbon steel 45#50#,stainless steel ss304,316size:M2-M80 Flat gasket