The McCormick 3540878M1 is a genuine OEM retaining ring designed for various Massey Ferguson, Landini, and McCormick agricultural tractors and machinery. This essential component ensures secure fastening and proper operation within assemblies. Manufactured to original equipment specifications, it offers reliable performance and durability. Compatible with a wide range of models across multiple series, including Massey Ferguson 100, 200, 300, 4000, 5000, 6000, 8000 series, McCormick C, CX, MC, MTX, XTX series, and Landini 50, 60, 70, 80, Legend, Powerfarm, Vision series.