The McCormick 3223556R1 fuel tank cap is a genuine OEM replacement part designed for McCormick and Case IH CX series tractors. This cap ensures a secure and tight seal for the fuel tank, preventing fuel spillage and contamination. It is essential for maintaining the integrity of the fuel system and protecting against debris. With an outer diameter of 75 mm, an inner diameter of 50 mm, and a height of 50 mm, this cap provides a precise fit for compatible models.