The McCormick 3405260R1 is an authentic OEM washer designed for a wide range of McCormick agricultural tractors, including the CX, MC, MTX, X, and TTX series. This critical component ensures proper spacing, load distribution, and secure fastening of parts, preventing loosening during operation. With an inner diameter of 10.5 mm, an outer diameter of 20 mm, and a thickness of 2 mm, this washer is manufactured to McCormick's precise specifications for reliable performance and durability in demanding agricultural environments.