However, I can help you locate it legally:
I cannot directly provide a PDF file or a link to download the standard, as that would likely violate copyright laws as well as the policies of this platform. DIN standards are protected by copyright (typically held by Beuth Verlag / DIN Media). din 3016 standard pdf
It covers hose fittings with clamp profile (primarily for hydraulic and pneumatic systems — typically clamp-type hose couplings, often with a profiled clamp or band). However, I can help you locate it legally: