90056-ZY9-M01 Flange (6x12) Bolt - Overview. The 90056-ZY9-M01 Flange (6x12) Bolt is an essential fastening component designed specifically for Honda marine engine systems. This bolt supports critical mounting and securing functions within the engine's rigging and accessory systems. Engineered for high reliability and precision, it ensures seamless integration with existing parts, maintaining optimal performance and durability.. Key Features. Flange bolt measuring 6mm diameter by 12mm length, pr