The McCormick 6634858A1 is a genuine OEM spacer designed for various McCormick X4, X5, X6, X7, and X8 series tractors. This essential component ensures correct spacing between parts, maintaining optimal alignment and function within the machinery. Manufactured to precise specifications with an inner diameter of 28.5 mm, an outer diameter of 40 mm, and a thickness of 20 mm, it guarantees a perfect fit and reliable performance for demanding agricultural applications.