While you cannot legally get a free PDF of the standard itself, you can often find technical datasheets from fastener manufacturers (like Bossard, Würth, or Fastenal) that summarize the complete dimensional and mechanical data of DIN 5464 nuts.
: Provides both hardcopy and PDF formats in English and German. DIN 5464 - 2010-03 din 5464 standard pdf
: It incorporates a higher number of teeth compared to general standards like DIN ISO 14 , maximizing surface area contact. While you cannot legally get a free PDF
The spline flanks feature a flat, straight profile perpendicular to the pitch circle. This design ensures that mating forces push purely tangentially, altogether preventing the hub from expanding outwards due to radial forces. din 5464 standard pdf