This genuine McCormick 6650838A1 Fuel Tank Cap is designed for a secure fit on various McCormick agricultural machinery, including CX, MC, MTX, XTX, T, and V Series tractors. Measuring 70 mm in outer diameter, 40 mm in inner diameter, and 40 mm in height, this essential component ensures proper sealing of the fuel tank. It is also cross-referenced as OEM part number 82011984 for New Holland and Case IH equipment, ensuring broad compatibility and reliable performance.