This genuine McCormick 6521665M1 brake disc is designed for optimal braking performance in various McCormick tractor models, including the MTX, XTX, MC, and X7 series. Measuring 228mm in outer diameter, 120mm in inner diameter, and 10mm in thickness, this disc features 26 splines for secure fitment. It is a critical component for maintaining the safety and operational efficiency of your agricultural machinery. This part is also compatible with numerous Massey Ferguson tractor models and cross-references with Massey Ferguson part numbers 3780186M1, 3780186M2, 3780186M3, and 3780186M4.