90501-ZVA-000 Washer Plain (8mm) - Overview. The 90501-ZVA-000 Washer Plain (8MM) is a critical hardware component supporting Honda marine engine systems. This simple yet vital part functions within the rigging and engine hardware to distribute load and protect adjoining components from damage while maintaining structural integrity during operation. Though small, it ensures seamless integration with existing parts, maintaining optimal performance and durability.. Key Features. Type: Plain Washer. System: Rigging and fastener hardware. Suitable Engines: Compatible with various Honda marine engines including BF2AK, BF2AH, and others. Brand: Honda (OEM). Series Hint: Marine Engine Hardware. OEM precision design matching factory specifications, dimensions, and tolerances. Provides even distribution of mechanical load where bolts and nuts interface. Helps protect engine and rigging components from wear and tear. Designed for durability in marine environments with corrosion-resistant materia