The McCormick 3647363M2 is a genuine OEM O-ring designed for various McCormick agricultural machinery, including X4, X5, X6, X7, X8, XTX, MTX, MC, CX, C, F, V, T, G, X60, X70, X50, X40, X30, X20, X10, XTRA, and XTREME series tractors. This critical sealing component ensures leak-free operation with an inner diameter of 120.37 mm, an outer diameter of 127.5 mm, and a thickness of 3.53 mm, providing a precise fit for hydraulic and other fluid systems.