90201-HW1-671 Flange (6x12) Bolt - Overview. The 90201-HW1-671 Flange (6x12) Bolt is a crucial component designed for Honda marine engine systems. This bolt supports the secure assembly of parts within the marine engine, providing reliable fastening to ensure system integrity under operational stresses. Crafted to match precise factory specifications, it ensures seamless integration with existing parts, maintaining optimal performance and durability.. Key Features. Genuine OEM flange bolt measur