The McCormick 6635105A1 is an authentic OEM washer, crucial for secure fastening in various McCormick agricultural machines. This flat washer is compatible with a wide range of McCormick tractors, including the X4, X5, X6, X7, and X8 series, as well as numerous Landini and Valpadana tractor models. Manufactured to precise specifications, it ensures optimal load distribution and prevents loosening of bolted connections, contributing to the longevity and reliable operation of your equipment.