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.
radial load direction, tight internal fit-up designation, 0.6693 inches nominal bore diameter, mil-g-23827 mil spec single material response lubrication material document and classification, 0.0001 inches minimum radial and 0.0003 inches maximum radial internal clearance