Thrust bearings are described comprising a sub­stantially planar thrust accepting member (19) having at least one locating portion (20) substantially at a right angle thereto and which is adapted to co-operate with a recess (22) formed in the bearing housing. In a preferred embodiment there are two locating portions and the co-operating recesses in the bearing housing have re-entrant geometry to prevent accidental displacement of the thrust bearing during installation of the shaft.