90203-ZV5-000 Hex (6Mm) Nut - Overview. The 90203-ZV5-000 Hex (6Mm) Nut is a specifically engineered fastener integral to Honda marine engine systems. This high-quality nut supports the rigging and accessory system, providing reliable securing of various components to maintain proper structural integrity and operational efficiency. Designed to meet factory dimensions and tolerances, it ensures seamless integration with existing parts, maintaining optimal performance and durability.. Key Features