90102-ZY9-000 Hex (12X186) Bolt - Overview. The 90102-ZY9-000 Hex (12X186) Bolt is a critical fastening component used in Honda marine engine systems. This bolt supports the mechanical assembly and stability of various engine parts, contributing to reliable operation and structural integrity. Specifically designed to meet Honda's specifications, it ensures seamless integration with existing parts, maintaining optimal performance and durability.. Key Features. Hexagonal bolt with dimensions 12x18