The Case IH K626921 is a genuine OEM flat washer designed for secure fastening in a wide range of Case IH agricultural and construction equipment. This essential component features an inner diameter of 13.5 mm, an outer diameter of 25.4 mm, and a thickness of 2.1 mm, ensuring proper fit and reliable performance. It is commonly used across numerous Case IH tractor, combine, cotton picker, forage harvester, and industrial/construction models, maintaining critical connections and preventing loosening due to vibration.