90181-ZW9-010 Bolt-Washer (5X10) - Overview. The 90181-ZW9-010 Bolt-Washer (5X10) is an essential OEM component designed for securing various parts within Honda marine engine systems. Its integral washer design offers a reliable fastening solution, enhancing the stability and operational integrity of marine equipment. Precision-engineered to Honda's stringent specifications, it ensures seamless integration with existing parts, maintaining optimal performance and durability.. Key Features. Genuin