4.750" hole diameter 6.640" outside diameter 0.219" material thickness eight holes equally spaced on 5.500 in. bolt circle 0.281 in. dia countersunk 82 deg one side 15 recessed
0.252" hole diameter 0.590" outside diameter 0.090" material thickness chamfer outside left edge 0.030 in. min, 0.070 in. max passivate surface treated 15 recessed