90056-ZY9-M00 Flange (6X12) Bolt - Overview. The 90056-ZY9-M00 Flange (6X12) Bolt is a crucial fastening component used in Honda marine engine systems. It supports the secure mounting of various parts, maintaining the structural integrity and performance of the marine engine assembly. Engineered for durability and precision, this flange bolt ensures seamless integration with existing parts, maintaining optimal performance and durability.. Key Features. Genuine Honda OEM flange bolt designed spec