Two single row annular ball bearings selected dimensionally to be a matched pair or set. The ring faces have been specially ground to specified offsets that will produce predetermined preload when mounted. May include a single row angular contact bearing with faces specially ground for duplex mounting.
2.9526 inches minimum and 2.9528 inches maximum bore diameter, tight internal fit-up designation, angular load direction, annual ball bearing for quiet operation application to submarine usage departure from cited document, zzzw criticality code justification