Metal spacer used between ball bearings of front suspension swivel hubs. This was used only with early type of bearing which did not have a spacer built into the inner race, as is currently the practice. Genuine Rover heat-treated part. Sold each, use one (1) per side.
See GHB0202 for a photo of the early type bearing without the integral center spacer. See GHK1018 for kit showing modern ball bearing design with integral spacer on inner race.
The separate spacer (21A1308) used in early taper roller bearing sets with a separate spacer is a different thickness than 21A0233, and is no longer available.