IKO Nippon Thompson NTB40603AS 40mm I.D Thrust Roller Bearing, 60mm O.D

Axial needle roller bearings should preferably be guarded on to the shaft
Space saving can be achieved if the faces of the adjacent parts are designed as raceways, so that washers can be dispensed with
Hardened steel cages
High load carrying capacity
High rigidity/space ratio

two axial washers.