90004-ZW1-003 Screw-Washer (5X12) - Overview. The 90004-ZW1-003 Screw-Washer (5X12) is a precision-engineered fastener designed specifically for use in Honda marine engine systems. This integrated screw and washer component plays a crucial role in securely fastening components within the marine rigging and accessory systems, keeping the engine and its associated parts operating reliably and efficiently. Crafted to meet Honda's exact specifications, it ensures seamless integration with existing p