90011-PNA-003 Head Cover Bolt A - Overview. The 90011-PNA-003 Head Cover Bolt A is a precision-engineered bolt designed to secure the head cover in Honda marine engine systems. This essential component ensures the reliable assembly of engine parts by maintaining proper sealing and mounting, which are crucial for optimal engine performance. Manufactured to exact OEM specifications, it ensures seamless integration with existing parts, maintaining optimal performance and durability.. Key Features.