90503-ZW5-U00 Washer Plain (5mm) - Overview. The 90503-ZW5-U00 Washer Plain (5mm) is an essential fastening component in Honda marine engine systems. It supports various mechanical assemblies by evenly distributing load and preventing damage to surfaces during tightening processes. This OEM washer is designed to meet factory specifications, ensuring seamless integration with existing parts and maintaining optimal performance and durability.. Key Features. Plain washer with a diameter of 5mm designed for marine applications.. Genuine Honda OEM part ensuring exact material quality and manufacturing standards.. Distributes load to protect surfaces and hardware from damage.. Precisely matches factory dimensions and tolerances for correct fit.. Works in conjunction with other rigging and fastening components.. Helps maintain expected durability, reliability, and operational performance.. Why Choose Genuine OEM. Using original Honda parts like the 90503-ZW5-U00 Washer Plain (5mm) preserves t