The McCormick 6660657A1 is a genuine OEM wheel hub designed for McCormick X4 and X5 series agricultural tractors. This essential component ensures proper wheel attachment and rotation, contributing to the stability and operational efficiency of the machinery. Weighing approximately 2.10 kg, this hub is a direct replacement part, compatible with various models including the X4.20, X4.30, X4.40, X4.50, X4.60, X4.70, X4.35, X4.45, X4.55, X4.65, X4.75, X5.20, X5.30, X5.40, X5.50, X5.60, X5.70, X5.35, X5.45, X5.55, X5.65, and X5.75.