90124-881-000 Bolt Flange (6X35) - Overview. The 90124-881-000 Bolt Flange (6X35) is a crucial fastening component used in Honda marine engine systems. This genuine OEM part is designed to provide secure mounting and connection of engine components, ensuring the engine operates reliably in marine environments. Engineered to meet Honda's strict factory specifications, this flange bolt ensures seamless integration with existing parts, maintaining optimal performance and durability.. Key Features.