90115-ZV5-821 Socket Bolt - Overview. The 90115-ZV5-821 Socket Bolt is a crucial fastener used in Honda marine engine systems, particularly within power trim-tilt assemblies and related rigging components. This bolt plays a vital role in securely fastening parts to maintain system integrity and operational reliability. Engineered to meet factory standards, it ensures seamless integration with existing parts, maintaining optimal performance and durability.. Key Features. A specialized socket bolt