Key Features Genuine John Deere concave washer, part numbers M43747 and UC33890 Distributes load evenly under bolt head or nut to secure fasteners and maintain preload Metal construction with corrosion resistance for long-term reliability Precise dimensions: inside diameter 1.015 in (25.781 mm); outside diameter 1.469 in (37.338 mm); thickness 0.044 in (1.1176 mm) Designed for assemblies within a washer thickness range of 0.77 mm to 9.53 mm Hassle-free replacement that fits existing fastener configurations in compatible John Deere equipment Seamless integration with John Deere components for consistent performance Product Details Material: metal with corrosion resistance Part numbers: M43747 (primary) / UC33890 Dimensions: inner 1.015 in (25.781 mm); outer 1.469 in (37.338 mm); thickness 0.044 in (1.1176 mm) Function: provides even pressure distribution under a bolt head or nut to secure assemblies and create or maintain space as needed Application: intended for replacements in John Deere equipment where a concave washer of this size and specification is required Installation: designed for straightforward, quick replacement to minimize downtime Quality: Genuine John Deere part ensuring compatibility with existing components and performance expectations Compatibility Fits John Deere equipment that specifies concave washer M43747 or UC33890 Exact fit is defined by inner diameter 25.781 mm, outer diameter 37.338 mm, and thickness 1.1176 mm Confirm compatibility with your equipment manual or service documentation to ensure the M43747/UC33890 washer matches the required spec and thickness range