The McCormick 6500521M2 Seal is a genuine OEM replacement part designed for various McCormick tractor models, including CX, MC, MTX, and X series. This high-quality sealing joint features an inner diameter of 40 mm, an `outer_diameter_mm` of 52 mm, and a thickness of 7 mm, ensuring a precise fit and reliable performance. It is crucial for maintaining the integrity of hydraulic systems or other critical components, preventing leaks and protecting against contaminants. This seal is an essential component for routine maintenance and repairs, ensuring the longevity and efficient operation of your agricultural machinery. Cross-references to Massey Ferguson 3613290M1.