90301-ZW7-U01 Hex (6Mm) Nut - Overview. The 90301-ZW7-U01 Hex (6Mm) Nut is a key hardware component used in Honda marine engine systems. This 6mm hex nut serves as a critical fastener within the rigging and control systems, ensuring secure assembly and reliable operation of various marine components. Engineered to factory specifications, it offers precision mounting and fastening capabilities that help maintain the mechanical integrity and performance of your Honda marine equipment. Its design s