90005-Zw9-030 Flange (6X20) Bolt - Overview. The 90005-ZW9-030 flange (6x20) bolt is a crucial fastening component designed specifically for Honda marine engine systems. It plays an integral role in securing different engine parts, ensuring structural integrity and operational reliability. Manufactured to meet exact factory specifications, this bolt ensures seamless integration with existing parts, maintaining optimal performance and durability.. Key Features. High-quality flange bolt measuring