90016-ZZ5-M01 Flange (6X28) Bolt - Overview. The 90016-ZZ5-M01 Flange (6X28) Bolt is an essential component manufactured for Honda marine engine systems. This flange bolt plays a critical role in securely fastening parts within the engine system, ensuring operational integrity and reliability. Designed specifically to fit Honda marine applications, it ensures seamless integration with existing parts, maintaining optimal performance and durability.. Key Features. Genuine Honda OEM flange bolt siz