The McCormick 6629265A1 Tensioner is a genuine OEM replacement part designed to maintain optimal belt tension in various McCormick X-series tractors. This essential component helps prevent slippage and ensures the efficient operation of engine accessories. Confirmed fitment for McCormick X4.20, X4.30, X4.40, X4.50, 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 models. With a weight of 0.12 kg and dimensions of 95 mm length, 25 mm width, and 51 mm height, this tensioner is built to precise specifications for reliable performance.