The McCormick 3665330M1 is a genuine OEM washer designed for reliable performance in agricultural and industrial machinery. This flat washer features an inner diameter of 16.3 mm, an outer diameter of 28.0 mm, and a thickness of 2.0 mm, with a weight of 0.004 kg. It serves as a critical spacing and sealing component, ensuring proper assembly and reducing wear on mating surfaces. This versatile part is also cross-referenced as an OEM equivalent for Massey Ferguson, Landini, and Case IH equipment, highlighting its broad applicability and adherence to high manufacturing standards.