The McCormick 180455M1 is a genuine OEM flat washer designed for critical applications in McCormick, Massey Ferguson, Landini, and Case IH agricultural machinery. This essential component ensures proper spacing and load distribution, preventing damage to surfaces and maintaining secure fastening. With an inner diameter of 10.5 mm, an outer diameter of 18 mm, and a thickness of 1.5 mm, it meets precise specifications for reliable performance and durability across a wide range of tractor models.