94002-05490-0S Hex (5Mm) Nut - Overview. The 94002-05490-0S Hex (5Mm) Nut is a standard M5 hexagonal nut essential for Honda marine engine systems. This nut plays a critical role in fastening components securely, helping maintain the operational integrity and reliability of the marine engine systems. Designed as a genuine OEM part, it ensures seamless integration with existing parts, maintaining optimal performance and durability.. Key Features. Standard M5 size hexagonal nut with 5mm diameter,