90029-ZY3-000 Bolt-Washer (5X18) - Overview. The 90029-ZY3-000 Bolt-Washer (5X18) is a critical fastening component used within Honda marine engine systems. This part functions as a combined bolt and washer with specified dimensions of 5mm diameter and 18mm length, ensuring reliable mechanical assembly and secure mounting of various engine components. As an OEM part, it guarantees seamless integration with existing parts, maintaining optimal performance and durability.. Key Features. Genuine Honda OEM bolt-washer designed for marine engine assembly.. Combines bolt and washer for reliable fastener performance and ease of installation.. Precisely engineered to factory specifications for exact fitment and tolerance.. Ensures secure mechanical connections critical to engine function and structural integrity.. Constructed of durable material to withstand marine operating conditions.. Integrates cleanly with associated components to prevent loosening or corrosion.. Why Choose Genuine OEM. Us