A comparatively flat rigid item, with or without a centrally located aperture, designed to hold an annular bearing or a sleeve bearing in a fitted inclosure. It must have drilled and/or tapped holes for mounting purposes. Excludes:end bell, electrical rotating equipment.
retainer part name assigned by controlling agency, nsn: 1520-01-492-6324 end item identification, this is a flight essential part special features, round, unthreaded mounting hole type, 23.200 inches nominal mounting hole diameter