The McCormick 86018406 is a genuine OEM sealing ring, commonly referred to as an O-ring, engineered for critical sealing applications in McCormick agricultural machinery. This high-quality component is designed to provide a secure and leak-free connection, essential for maintaining system integrity and operational efficiency. With an internal diameter of 100 mm, an external diameter of 105 mm, and a thickness of 2.5 mm, it meets precise specifications for reliable performance in models such as the McCormick X7.670 and X7.680 series tractors.