DS DS/EN ISO 10673
DS DSEN SO 10673 2009-JUL-20 Plan washers for screw and washer assembles - Small normal and large seres - Product grade A
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The European Standard specifies the characteristics of plain steel washers, small, normal and large series, of product grade A with hardness classes 200 HV and 300 HV for metric screw and washer assemblies according to ISO 10644.