This genuine McCormick 6634846A1 spacer is an original equipment manufacturer (OEM) part designed for various McCormick X-series agricultural tractors. It is compatible with models including X4.20, X4.30, X4.40, X4.50, X4.60, X4.70, X5.35, X5.45, X5.55, X6.420, X6.430, X6.440, X7.440, X7.450, X7.460, X7.650, X7.660, X7.670, X7.680, X8.660, X8.670, and X8.680. This essential component ensures precise spacing and alignment within the machinery, contributing to optimal performance, reduced wear, and extended operational life. Trust in OEM quality for a perfect fit and reliable durability in demanding agricultural applications.