90101-ZW4-H00 Hex (12X80) Bolt - Overview. The 90101-ZW4-H00 Hex (12X80) Bolt is a critical component for Honda marine engine systems. This hexagonal-head bolt, measuring 12mm in diameter and 80mm in length, plays an essential role in securing various brackets and components vital for maintaining engine stability and function. Its precise design ensures seamless integration with existing parts, maintaining optimal performance and durability.. Key Features. High-quality hex bolt designed specific