90304-881-010 Nut (6Mm) - Overview. The 90304-881-010 Nut (6mm) is a vital hardware component within Honda marine engine systems. Designed primarily to fasten various parts securely, this nut plays a crucial role in maintaining the integrity and reliability of mechanical assemblies in Honda marine equipment. Its precise dimensions and engineering ensure seamless integration with related components, contributing to the overall performance and safety of your marine engine setup.. Key Features. Thi