A bearing retaining washer is a thin, durable disc used to hold bearings securely in place inside a caster wheel. It keeps the bearing from shifting during movement, which helps maintain smooth rolling and proper alignment. By preventing unwanted play and supporting the bearing assembly, these washers extend the life of both the wheel and the bearing, making them an essential part of a reliable caster setup.

“RW” indicates Steel retaining washer. “SW” indicates Steel retaining washer with neoprene seal.