The crown nut spring swing pin AA for the Citroën U23 is a crucial fastening component that provides stability and safety in this classic vehicle's suspension system. It ensures a solid connection between the spring swing pin and suspension parts, essential for a smooth driving experience. Made from durable materials to resist corrosion, this crown nut guarantees long-lasting performance and reliability. Perfect for restoration projects, it helps to retain the authentic driving experience of the Citroën U23.