HSN Code 5604 refers to "Textile-covered rubber thread and cord; textile yarn, strip and the like of heading 5404 and 5405, impregnated, coated, covered or sheathed with rubber or plastics (excluding imitation catgut, thread and cord with fish-hook attachments or otherwise put up as fishing line)." This classification code is essential for identifying textile-covered rubber products for import/export purposes based on their nature, composition, and intended use. Common products under HSN Code 5604 include rubberized textile cords, coated yarns, and sheathed strips. Additionally, the GST rate for textile-covered rubber threads and related items under this code supports accurate trade compliance.