This washer serves as the mating raceway surface for axial needle roller and cage assemblies, providing a hardened flat bearing face for axial load transfer. Manufactured to DIN 5405-3/ISO 303, it is designed for use with AXK and K811 series axial bearings. Net mass is 7.55 g. The flat raceway design allows the washer to accommodate axial loads while the mating needle roller assembly handles the rolling contact, keeping the arrangement compact in the axial direction. Since it functions purely as a bearing washer without integrated sealing or lubrication provisions, correct mounting alignment and separate lubrication of the mating needle assembly must be ensured during assembly.