Here is the way to obtain the DIN 5482 standard (even in PDF form):
Do you need help calculating for a specific size? din 5482 spline standard pdf
Since official standards organizations prefer to sell the modern DIN 5408 / ISO 4156 standards, sourcing a historical DIN 5482 PDF requires navigating legacy databases. Here is the way to obtain the DIN
If you want, I can:
for all profiles. This profile ensures high structural strength at the tooth root and smoother power distribution compared to straight-sided or parallel splines. Pitch and Module ( din 5482 spline standard pdf