90018-ZV5-000 Flange (6X70) Bolt - Overview. The 90018-ZV5-000 Flange (6X70) Bolt is a vital component in Honda marine engine systems. It plays a key role in securing parts together, ensuring structural stability and seamless operation. Precision-engineered to match factory specifications, this bolt supports the overall function of the marine engine by providing reliable flange connection. Designed for exact fitment and durability, it ensures seamless integration with existing parts, maintaining