90103-ZV1-000 Hex (6x140) Bolt - Overview. The 90103-ZV1-000 Hex (6x140) Bolt is a crucial component used in Honda marine engine systems, specifically designed to securely fasten parts within the engine assembly. This hexagonal bolt supports the stern bracket system in Honda Marine engines, ensuring mechanical stability and reliable operation under demanding marine conditions. Engineered to match precise factory specifications, it ensures seamless integration with existing parts, maintaining opt