90101-ZV1-000 Hex (6X18) Bolt - Overview. The 90101-ZV1-000 Hex (6X18) Bolt is an essential component used in Honda marine engine systems. This hexagonal-head bolt, measuring 6mm by 18mm, is engineered to securely fasten various engine parts, ensuring reliable mechanical integrity and operational stability. Designed to precise factory specifications, it ensures seamless integration with existing parts, maintaining optimal performance and durability.. Key Features. OEM genuine Honda hex bolt, siz