The JCB 40002031 is a genuine OEM O-ring specifically designed for sealing applications within various JCB agricultural and construction machinery. This high-quality O-ring is manufactured from Nitrile Butadiene Rubber (NBR) with a hardness rating of 70 Shore A, ensuring excellent resistance to oils, fuels, and hydraulic fluids, and providing reliable sealing performance. It features an inside diameter of 12.37 mm and a cross-section of 2.62 mm, making it suitable for precise fitment in hydraulic and pneumatic systems to prevent leaks and maintain operational efficiency across a wide range of JCB models.