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.
5.750 inches nominal outside diameter, 3.250 inches minimum and 3.252 inches maximum aperture diameter, qq-n-281,class a fed spec single material response overall material document and classification, 5.249 inches minimum and 5.251 inches maximum outside raised surface diameter, 6 bolt circle hole quantity