The McCormick G205900900020 is a genuine OEM fuel tank cap designed for a wide range of McCormick X-series tractors, including X4, X5, X6, X7, and X8 models. This essential component ensures a secure seal for the fuel tank, protecting the fuel system from contaminants and preventing spills. Manufactured to McCormick's original specifications, it guarantees optimal fit and reliable performance for maintaining your agricultural machinery.