8309.90.00 - Other

This HTS category, 8309.90.00, encompasses a broad range of closures, seals, and packing accessories not specifically enumerated in other headings within 8309. These items are primarily constructed from base metal and serve to seal, secure, or enhance the packaging of various goods. Examples include threaded metal bungs, bung covers, metallic seals used in conjunction with closures, and other specialized packing accessories designed for containers like drums, barrels, or bottles, provided they are not more specifically classified elsewhere.

Distinguishing this category from its sibling, 8309.10.00.00 (Crown corks), is crucial. While crown corks are a distinct type of metal closure for bottles, this category covers all other metal closures, seals, and packing accessories that do not fit the specific definition of a crown cork. The defining characteristic here is that the items are general packing accessories of base metal, excluding the specifically identified crown corks.

The subcategories within 8309.90.00 are organized by material and type. The "Of aluminum" subcategory segregates items made from aluminum, reflecting the common practice of differentiating metal classifications by base material for potential tariff or regulatory purposes. The "Other" subcategory serves as a residual category for base metal packing accessories not made of aluminum, ensuring comprehensive coverage within this broader HTS heading.