90049-ZY6-020 Flange (5X12) Bolt - Overview. The 90049-ZY6-020 Flange (5X12) Bolt is a crucial fastening component within Honda marine engine systems. This flange bolt secures critical parts together, ensuring structural integrity and reliable mechanical connections under marine operating conditions. Designed specifically for use in Honda marine applications, it ensures seamless integration with existing parts, maintaining optimal performance and durability.. Key Features. This bolt is designed