DIN 931 has been withdrawn and replaced by ISO 4014. There is some similarity (nominal dimensions extended | Widths across flats changed for M10, M12, M14 and M22).
Würth Catalogue(2)
Catalogue page as PDF 1 | 2 | 3 | 4 | 5 | 6
Flip catalog
Datasheets(1)
CAD Data (available after login)
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