90113-ZV5-000 Hex (6X25) Bolt - Overview. The 90113-ZV5-000 Hex (6X25) Bolt is a vital fastening component within Honda marine engine systems. This hexagonal bolt, measuring 6mm in diameter and 25mm in length, supports the structural integrity of engine assemblies by securely fastening parts in systems such as the gear case and extension case. Designed to meet stringent factory specifications, it ensures seamless integration with existing parts, maintaining optimal performance and durability.. K