90003-ZZ3-030 Flange (8X90) Bolt - Overview. The 90003-ZZ3-030 flange (8X90) bolt is an essential fastening component used in Honda marine engine systems. This bolt plays a crucial role in securely mounting and fastening components to ensure the mechanical stability and reliability of the engine assembly. Designed specifically for Honda marine applications, it ensures seamless integration with existing parts, maintaining optimal performance and durability.. Key Features. Genuine OEM Honda flange