DS DS/EN ISO 4759-1
DS DSEN SO 4759-1 2001-JAN-10 Tolerances for fasteners - Part 1 Bolts screws studs and nuts - Product grade A B and C
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This part of ISO 4759 specifies a selection of tolerances for bolts, screws, studs and nuts with ISO metic threads and with product grades A, B and C and for tapping screws with product grade A.