90031-PV0-305 Bolt-Washer (10X30) - Overview. The 90031-PV0-305 Bolt-Washer (10X30) is a crucial component for Honda marine engine systems. This part serves as a specialized bolt with an integrated washer, designed to secure mechanical components reliably while preventing loosening and ensuring a firm mounting. Manufactured to factory specifications, it ensures seamless integration with existing parts, maintaining optimal performance and durability.. Key Features. Specific type of bolt and washe