90107-ZY3-000 Flange (8X18) Bolt - Overview. The 90107-ZY3-000 flange (8X18) bolt is an essential fastener designed specifically for Honda marine engine systems. This bolt plays a crucial role in securely fastening components, ensuring reliable operation and structural integrity of the engine assembly. Engineered to exact factory specifications, it ensures seamless integration with existing parts, maintaining optimal performance and durability.. Key Features. Genuine OEM Honda flange bolt, sized