This is a genuine OEM McCormick part number 706291R2 washer, also cross-referenced as International Harvester 706291R1 and Case IH 706291R2. It features an inner diameter of 11.5 mm, an outer diameter of 20 mm, and a thickness of 2 mm. This durable washer is designed for precise fitment in a wide range of agricultural and industrial machinery, including numerous McCormick, International Harvester, and Case IH tractor models, ensuring proper component spacing and secure fastening.