The McCormick 6690610A1 is a genuine OEM washer designed for use in a wide range of McCormick agricultural tractors. This essential component provides secure fastening, distributes load, and maintains proper spacing between parts, contributing to the reliable operation of machinery. With an inner diameter of 10.5 mm, an outer diameter of 20 mm, and a thickness of 2 mm, this washer meets precise specifications for optimal fit and performance in compatible McCormick C, CX, F, MC, MTX, T, X, XTX, and ZTX series models.