90435-ZZ5-M00 Washer (10X28X5) - Overview. The 90435-ZZ5-M00 Washer (10X28X5) is a precision-engineered part designed specifically for Honda marine engine systems. This washer plays a crucial role in providing a secure and reliable spacing or sealing solution within the marine engine's mechanical assemblies. Engineered to Honda's exact factory dimensions and tolerances (10mm inner diameter, 28mm outer diameter, and 5mm thickness), it ensures seamless integration with existing parts, maintaining