90402-ZW4-000 Plain (5MM) Washer - Overview. The 90402-ZW4-000 Plain (5MM) Washer is an essential hardware component in Honda marine engine systems. This washer supports the rigging and accessory system by evenly distributing the load of bolts or screws, ensuring reliable fastening while preventing damage to adjoining surfaces. Designed for use in various Honda marine equipment, it ensures seamless integration with existing parts, maintaining optimal performance and durability.. Key Features. OEM Genuine Honda Washer designed to factory specifications.. 5mm inner diameter plain washer for effective load distribution.. Made to match precise dimensions and tolerances for perfect fit.. Integrates cleanly with existing fasteners, seals, and housings.. Essential for maintaining system reliability and structural integrity.. Helps preserve the expected durability and performance during marine operations.. Why Choose Genuine OEM. Using original Honda parts like the 90402-ZW4-000 Plain (5MM) Wa