90102-ZVD-000 Bolt-Washer (6X50) - Overview. The 90102-ZVD-000 Bolt-Washer (6X50) is a precision-engineered fastening component essential for Honda marine engine systems. This bolt assembly combines a six-millimeter diameter with a 50-millimeter length, serving as a critical mounting and securing element to keep various components tightly fastened and functioning reliably. Designed to the highest standards, it ensures seamless integration with existing parts, maintaining optimal performance and