Original equipment manufacturer (OEM) plug, part number 6678522A1, designed for a wide range of McCormick, Case IH, and New Holland agricultural tractors. This essential component provides a secure seal within hydraulic or engine systems. Confirmed fitment includes McCormick X4, X5, X6, X7, X8 series; Case IH Farmall C, JX, Maxxum, Puma, Vestrum, Optum series; and New Holland T5, T6, T7, T8 series. Manufactured to precise specifications for reliable performance and durability.