The McCormick 81345C1 O-Ring is a genuine OEM sealing component designed for various International Harvester and Case IH agricultural machinery, including a wide range of tractors and engines. This durable O-ring provides a critical seal, preventing leaks and maintaining system integrity in hydraulic, engine, or transmission applications. With an inner diameter of 20.62 mm, an outer diameter of 27.76 mm, and a thickness of 3.53 mm, it ensures a precise fit and long-lasting performance in demanding agricultural environments. This part is essential for maintaining the operational efficiency and reliability of your equipment.