The McCormick 3695978M1 is an M10 flat washer, essential for securing components in various Massey Ferguson agricultural and industrial machinery. This genuine washer features an inner diameter of 10.5 mm, an outer diameter of 20 mm, and a thickness of 2 mm, ensuring a precise fit and reliable performance. It is a direct replacement for the original part, compatible with a wide range of MF tractor series including 100, 200, 300, 500, 600, 1000, 2000, 3000, 4000, 5000, 6000, and 8000 series, as well as specific industrial models.