The JCB 90420271 is a genuine OEM O-Ring, also known as a seal ring, designed for critical sealing applications within JCB agricultural and construction machinery. This high-quality component ensures a tight, leak-free seal in hydraulic systems, engines, and other assemblies, maintaining optimal performance and preventing fluid loss. Manufactured to JCB's exacting standards, it provides reliable durability and precise fitment for a wide range of JCB models including 3CX, 4CX, Loadall, and Fastrac series.