Replacement 54mm Radius Face Bearing.  OD spinning bearing that press fits onto Tilton hydraulic release bearing piston P/N 62-6100 and 62-6102.  Replacement bearing for Tilton hydraulic release bearing part numbers: 60-0400, 60-0420, 60-1400, 60-1420, 60-3400, 60-3420, 60-4400, 60-4420, 60-8400 and 60-8420.