90012-ZW1-010 Hex (10x90) Bolt - Overview. The 90012-ZW1-010 Hex (10x90) Bolt is a precision-engineered fastener designed specifically for Honda marine engine systems. This hexagonal bolt plays a critical role in securing various components within the marine engine assembly, helping maintain structural integrity and optimal operation. Crafted to Honda's exact factory specifications, it ensures seamless integration with existing parts, maintaining optimal performance and durability.. Key Features