Used on a/c f-16. 2.692" inside diameter 2.772" outside diameter 0.175" major thickness two holes, 0.063 in. dia, centered 0.100 in. from one edge 180.0 deg apart anodize surface treated
Used on aircraft e-3a. 0.253" inside diameter 0.260" outside diameter 0.044" major thickness straight gap ring style external flange at one end, 0.278 in. od passivate surface treated