The McCormick 303590A2 is a genuine OEM adjusting ring designed for precise fitment in McCormick agricultural equipment. This essential component ensures proper spacing and alignment within assemblies, contributing to the smooth operation and longevity of your machinery. With a confirmed thickness of 1.95 mm, it meets original manufacturer specifications for reliable performance. This adjusting ring is crucial for maintaining optimal clearances in various applications, preventing premature wear and ensuring efficient power transmission.