DIN 125 ISO 7089 7090 plain washers with/without chamfer.
Material: Steel
1) Hardness grade 140HV, hardness HV140-250; hardness grade 200HV, hardness HV200-250
2) Stainless steel hardness grade 140HV, hardness HV140-250; hardness grade 200HV, hardness HV200-250; stainless steel groups A2 and A4, F1, C1 and C4
3) Gaskets can be made of non-ferrous metals or other materials