90019-PT0-000 Flange (6X18) Bolt - Overview. The 90019-PT0-000 Flange (6X18) Bolt is a vital component designed for Honda marine engine systems. It plays an essential role in securely fastening parts within the engine, ensuring the reliable operation and structural integrity of your marine equipment. This bolt is engineered to exact factory specifications, guaranteeing seamless integration with existing parts, maintaining optimal performance and durability.. Key Features. Genuine OEM flange bolt