90013-Zv4-010 Flange (6X20) Bolt - Overview. The 90013-ZV4-010 flange (6X20) bolt is a critical component in Honda marine engine systems. This bolt serves as a secure fastening element within the Honda Active series, maintaining the integrity and stable mounting of essential marine engine parts. Designed to exact OEM standards, it ensures seamless integration with existing parts, maintaining optimal performance and durability.. Key Features. Genuine OEM flange bolt sized at 6mm x 20mm, tailored