This genuine McCormick/International Harvester 399827R1 adjustment washer is designed for precise fitment in a range of agricultural machinery. It ensures proper spacing and alignment in critical components. With an outer diameter of 50 mm, an inner diameter of 30 mm, and a thickness of 1.5 mm, this durable washer is a direct replacement for original specifications. It is compatible with IH tractor models including 454, 464, 484, 574, 584, 674, 684, 784, 884, 984, 1086, 1486, Hydro 84, Hydro 186, as well as 510, 515, 520, 530 loaders, and 1400, 1455, 1822, 1844 cotton pickers.