90604-ZW5-030 Tube (D15) Clamp - Overview. The 90604-ZW5-030 Tube (D15) Clamp is an essential component in Honda marine engine systems. It is specifically designed to secure D15 size tubes, contributing to the reliable operation and integrity of the marine engine's fuel and fluid systems. Engineered to match Honda's factory specifications, this clamp provides a seamless fit and excellent durability, ensuring optimal performance and long-lasting service.. Key Features. Precisely engineered clamp