The drawings are from the International Docking System Standard which is in the public domain.
International Space Station Multilateral Coordination Board
<a rel="nofollow" class="external free" href="http://www.internationaldockingstandard.com/download/IDSS_IDD_Revision_D_043015.pdf">http://www.internationaldockingstandard.com/download/IDSS_IDD_Revision_D_043015.pdf</a>