The Ford New Holland 81863105 is a genuine OEM O-ring designed for the gearbox cover of a wide range of Ford and New Holland agricultural tractors. This essential sealing component ensures a tight, leak-free connection, preventing fluid loss and protecting internal gearbox components. With an inside diameter of 53.97 mm, an outside diameter of 60.32 mm, and a thickness of 3.17 mm, this O-ring provides precise fitment and reliable performance for maintaining optimal gearbox function.