The McCormick 3681827M91 Collar is a genuine OEM component designed for various McCormick X5, X6, X7, and X8 series agricultural tractors. This essential part ensures the secure fastening and proper alignment of components within the machinery, maintaining operational integrity and preventing wear. Manufactured to McCormick's stringent quality standards, this collar provides reliable performance and precise fitment for models including X5.20, X5.30, X5.40, X5.50, 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.