The McCormick 6679874A1 is a genuine OEM shaft designed for various McCormick X-series tractors. This essential component ensures proper power transmission and functionality within the machinery. It is compatible with McCormick X4.30, X4.35, X4.40, X4.45, X4.50, X4.55, X4.60, X4.70, X4.80, X4.90, X5.20, X5.30, X5.40, X5.50, X5.60, X5.70, X5.80, X5.90, X6.420, X6.430, X6.440, X6.460, X7.440, X7.450, X7.460, X7.650, X7.660, X7.670, X7.680, X7.690, X8.660, X8.670, and X8.680 models.