The Case IH 87803109 is a genuine OEM O-ring specifically designed for thermostat applications in a wide range of Case IH, New Holland, and Steyr agricultural and construction equipment. This sealing piece ensures a reliable, leak-free connection, which is critical for maintaining optimal engine temperature and overall system integrity. Manufactured to precise specifications with an inner diameter of 50.5 mm, an outer diameter of 56.5 mm, and a thickness of 3 mm, it offers durability and perfect fitment for compatible models.