The New Holland 81815991 is a genuine OEM flat washer designed for critical applications in agricultural and construction machinery. This robust washer features an inner diameter of 17.5 mm, an outer diameter of 30 mm, and a thickness of 2.5 mm. It ensures proper spacing and load distribution, preventing wear and loosening in bolted assemblies. Compatible with a wide range of New Holland and Case IH tractors, as well as AGCO, Challenger, Fendt, Massey Ferguson, and Valtra equipment, ensuring reliable performance and fit.