HSN Code 8309 refers to "Stoppers, caps and lids, incl. crown corks, screw caps and pouring stoppers, capsules for bottles, threaded bungs, bung covers, seals and other packing accessories, of base metal." This classification code is essential for identifying packaging accessories and related items for import/export purposes based on their nature, composition, and intended use. Common products under HSN Code 8309 include crown corks, screw caps, pouring stoppers, threaded bungs, and various seals. Additionally, the GST rate for stoppers, caps, and lids under this code ensures accurate trade compliance.