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ISO 888:2012
Fasteners - Bolts, screws and studs - Nominal lengths and thread lengths
ISO 888:2012 specifies lengths and thread lengths for bolts, screws and studs for use in appropriate product standards and other relevant documents, e.g. for parts per drawing.
It applies to bolts, screws and studs with ISO metric screw thread according to ISO 68-1.
International Organization for Standardization [iso]