The McCormick A186977 sleeve is a genuine OEM component designed for durability and precise fitment in a range of McCormick F-series tractors, as well as numerous Case IH and David Brown models. This critical sleeve ensures proper operation and longevity of associated machinery parts. With an inner diameter of 44.5 mm, an outer diameter of 50.8 mm, and a length of 63.5 mm, it meets exact specifications for reliable performance. It is a direct replacement for OEM part numbers including Case IH 305886R91 and David Brown K915007.