90001-ZV1-000 Special (6Mm) Bolt - Overview. The 90001-ZV1-000 Special (6Mm) Bolt is a specialized fastener designed primarily for Honda marine engine systems. It plays a critical role in securing components where a precise 6mm bolt is required, contributing to the overall reliability and durability of the marine engines. Engineered to exact factory specifications, this bolt ensures seamless integration with existing parts, maintaining optimal performance and durability.. Key Features. Special 6