A rigid item usually circular in shape, designed to accommodate a bearing. It positions the bearing but does not encase it or restrain its motion.
3.7520 inches minimum and 3.7620 inches maximum bore diameter, steel overall material, 0.0920 inches minimum and 0.0950 inches maximum overall width, 4.5950 inches minimum and 4.6150 inches maximum outside diameter, flat race surface style designator