DS DS/EN ISO 7093-1
DS DSEN SO 7093-1 2000-NOV-15 Plan washers - Large seres - Part 1 Product grade A
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This part of ISO 7093 specifies the characteristics of large-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 64 mm inclusive.