90049-ZY6-030 Flange (5X12) Bolt - Overview. The 90049-ZY6-030 Flange (5X12) Bolt is a critical component within Honda marine engine systems. This bolt is engineered to secure flanges reliably, supporting the structural integrity and proper operation of various marine engine assemblies. Designed to exacting factory specifications, it ensures seamless integration with existing parts, maintaining optimal performance and durability.. Key Features. Specifically designed for flange mounting with dime