The New Holland 86631606 O-RING is a genuine OEM replacement part designed to provide a secure and leak-proof seal in various New Holland agricultural and construction equipment. This O-ring features an inner diameter of 15.54 mm, an outer diameter of 19.61 mm, and a thickness of 2.03 mm, ensuring precise fitment and reliable performance across a wide range of compatible models including T-series tractors, CR/CH combines, telehandlers, wheel loaders, skid steer loaders, backhoe loaders, graders, windrowers, and forage harvesters.