3.187" outside diameter holes countersunk 100 deg by 0.385 in. dia! all surfaces finished 125 microinches! surface flatness to be held within 0.005 in. cadmium surface treated
plate, retaining, bearing; steel; cadmium plated finish; rd shape; 5 in od, 0.125 in thk; 6 mtg holes, 0.281 in dia, equally spaced on 4.375 in dia circle