CLAMP/Round, open size: 1.968, closed size: 1.890, depth: 1, aluminum, chem-film (alodine) finish. Boeing certified. 161151-164388 Round Clamp | 2in, 1in Depth, Chem-Film Alodine FinishMSP avionics clamps eliminate the need for panel removal when repairing or replacing an instrument such as an altim..