90129-ZVL-000 Bolt Hex (12X150) - Overview. The 90129-ZVL-000 Bolt Hex (12X150) is a critical fastening component designed specifically for Honda marine engine systems. This hexagonal bolt, measuring 12mm by 150mm, provides reliable mechanical securing in the rigging and accessory systems, ensuring components stay firmly connected and functional. As an original equipment manufacturer (OEM) part, it ensures seamless integration with existing parts, maintaining optimal performance and durability..