90122-ZY3-000 Hex (12X50) Bolt - Overview. The 90122-ZY3-000 hex (12X50) bolt is a critical fastening component designed for Honda marine engine systems. This bolt, measured at 12mm in diameter and 50mm in length, plays an essential role in securing various parts within the engine assembly to ensure reliable operation and durable performance. Manufactured to meet exact OEM specifications, it guarantees seamless integration with existing hardware and maintains consistent system functionality and