The McCormick A188649 is a genuine OEM shim designed for precise adjustment and spacing in various McCormick agricultural machinery. This critical component ensures proper alignment and reduces wear in mechanical assemblies. With an outer diameter of 53.975 mm, an inner diameter of 41.275 mm, and a thickness of 0.127 mm, it provides accurate fitment for a wide range of McCormick CX, MC, MTX, X6, X7, X8, and XTX series tractors, ensuring optimal performance and longevity.