90028-ZVL-000 Flange (6x18) Bolt - Overview. The 90028-ZVL-000 flange (6x18) bolt is a critical fastening component within Honda marine engine systems. Primarily used to securely connect flanges, this bolt supports structural integrity and operational reliability in marine engine assemblies. Engineered to match precise factory specifications, it ensures seamless integration with existing parts, maintaining optimal performance and durability.. Key Features. Genuine OEM Honda flange bolt designed