The Case IH 9221150 is a genuine OEM lock washer designed to provide secure fastening for bolts and nuts in various Case IH agricultural and construction equipment. This essential component helps prevent loosening due to vibration and operational stress, ensuring reliable performance and safety. It features an internal diameter of 12.7 mm, suitable for 1/2 inch bolts, and is commonly used across a wide range of models including combines (2144, 2166, 2344, 2366, 2388, 2577, 2588, 5088, 6088, 7088) and tractors (MX100, MX110, MX120, MX135, MX150, MX170).