90046-ZY3-000 Flange (8X100) Bolt - Overview. The 90046-ZY3-000 Flange (8X100) Bolt is a crucial fastening component engineered specifically for Honda marine engine systems. This bolt, featuring a flange head and measuring 8x100mm, plays an integral role in securing various marine engine parts, ensuring stable and reliable operation. Designed to fit seamlessly within Honda's marine assemblies, it supports the engine's structural integrity and helps prevent loosening under vibration and mechanica