Genuine McCormick 6608129A1 O-ring, specifically designed for a wide range of McCormick agricultural tractors including CX, MC, MTX, X4, X5, X6, X7, and X8 series. This essential sealing component features an inner diameter of 44.4 mm, an outer diameter of 50.8 mm, and a thickness of 3.2 mm, ensuring a reliable and leak-free seal in various applications. It is also cross-referenced with equivalent OEM part numbers from Case IH, Landini, Massey Ferguson, New Holland, and Valtra, highlighting its broad compatibility and quality.