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.
hiab crane hemtt (heavy expanded mobility tactical truck); 3990-01-442-1939 bap (bridge adapter pallet) end item identification, 30.00 millimeters nominal bore diameter, 66 fed std single material response overall material document and classification, 1.00 millimeters nominal overall width, 47.00 millimeters nominal outside diameter