90051-ZZ5-M01 Flange (8X18) Bolt - Overview. The 90051-ZZ5-M01 flange (8X18) bolt is a critical fastening component used in Honda marine engine systems. This bolt supports the integrity and assembly of various marine engine parts, ensuring they remain securely mounted during operation. Engineered specifically for Honda marine applications, it ensures seamless integration with existing parts, maintaining optimal performance and durability.. Key Features. Flanged bolt with precise dimensions of 8x