DS DS/EN ISO 7092
DS DSEN SO 7092 2000-NOV-15 Plan washers - Small seres - Product grade A
This International Standard specifies the characteristics of small-series, product-grade-A plain washers in the 200 HV and 300 HV hardness classes and of nominal sizes (nominal thread diameters) ranging from 1,6 mm to 36 mm inclusive.