HSN Code 8604 refers to "Railway or tramway maintenance or service vehicles, whether or not self-propelled, e.g., workshops, cranes, ballast tampers, trackliners, testing coaches and track inspection vehicles." This classification code is essential for identifying specialized vehicles used in the maintenance and servicing of railway and tramway systems for import/export purposes based on their nature, composition, and intended use. Common products under HSN Code 8604 include railway workshops, mobile cranes, ballast tampers, trackliners, testing coaches, and track inspection vehicles. Additionally, the GST rate for these maintenance and service vehicles under this code supports accurate trade compliance.