90124-ZV4-000 Hex (6x20) Bolt - Overview. The 90124-ZV4-000 Hex (6x20) Bolt is a critical fastening component within Honda marine engine systems. Designed to secure essential parts such as propeller shafts and other structural elements, this bolt supports reliable mechanical connections crucial for optimal engine operation. Constructed as a genuine OEM part, it ensures seamless integration with existing parts, maintaining optimal performance and durability.. Key Features. Genuine Honda OEM Hex B