Hexagon nuts complying with the DIN 934 standard cannot support test loads as per DIN EN ISO 898-2.
The strength class designation has two vertical bars added before and after the strength code to differentiate.
DIN 934 has been withdrawn and replaced by ISO 4032/8673. There is no similarity (nominal diameter changed | Some nut heights changed | Widths across flats changed for M10, M12, M14, M22 | ISO 4032 for standard thread | ISO 8673 for fine thread).
CAD data (available after login)
Thread type x nominal diameter (D)
External drive (s1)