90005-ZW1-003 Screw-Washer (4X8) - Overview. The 90005-ZW1-003 Screw-Washer (4X8) is a crucial hardware component used in Honda marine engine systems. This screw features an integrated washer, measuring 4 millimeters in diameter and 8 millimeters in length, designed to support secure assembly and ensure reliable fastening in various engine modules. Manufactured as a genuine OEM part, it ensures seamless integration with existing parts, maintaining optimal performance and durability.. Key Feature