90005-PAA-A01 Bolt-Washer (12X163) - Overview. The 90005-PAA-A01 Bolt-Washer (12X163) is a critical fastening component designed for Honda marine engine systems. This part serves the essential role of securing components with precise 12mm x 163mm dimensions, ensuring structural integrity and optimal mechanical function within the engine assembly. Crafted to match factory specifications, it ensures seamless integration with existing parts, maintaining optimal performance and durability.. Key Feat