90101-881-010 Hex (6X12) Bolt - Overview. The 90101-881-010 Hex (6X12) Bolt is a crucial fastening component designed for Honda marine engine systems. This hex head bolt, measuring 6x12 mm, plays an essential role in securing various engine components to ensure reliable operation and structural integrity. Crafted to meet OEM standards, it ensures seamless integration with existing parts, maintaining optimal performance and durability.. Key Features. Hexagonal head bolt with dimensions 6x12 mm, o