90105-881-000 Hex (6X12) Bolt - Overview. The 90105-881-000 Hex (6X12) Bolt is a critical component in Honda marine engine systems. This hexagonal head bolt, measuring 6mm in diameter and 12mm in length, is designed to secure various parts within the engine system reliably. Its precise engineering ensures seamless integration with existing parts, maintaining optimal performance and durability in demanding marine environments.. Key Features. Hexagonal bolt with dimensions 6X12 mm, ensuring accura