90063-ZVL-010 Flange (6X37) Bolt - Overview. The 90063-ZVL-010 flange (6X37) bolt is a crucial part in Honda marine engine systems. It plays an essential role in securely fastening components within marine engine assemblies, helping maintain mechanical integrity and operational reliability. Designed specifically for Honda Marine applications, it ensures seamless integration with existing parts, maintaining optimal performance and durability.. Key Features. This flange bolt, sized 6x37, is design