Chapter 83 covers miscellaneous articles of base metal, including building structures, furniture fittings, locks, hinges, door and window fittings, bells, ornaments, hoses, sleeves, stoppers, caps, etc. Articles of this chapter are usually made of base metal (such as iron, steel, copper, aluminum, etc.), but exclude machinery, electrical or vehicle parts more specifically classified. The key feature is that these goods are general base metal articles and do not constitute complete equipment of other chapters (such as Chapter 84 machinery, Chapter 85 electrical). Heading 8309 covers base metal stoppers, caps, bottle caps, screw caps, seals and other packing accessories. It includes crown caps, screw caps, tamper-evident rings, easy-open lids, etc., commonly used for sealing bottles and cans. The material must be base metal (such as tinplate, aluminum, steel); plastic caps, even with metal parts, are usually classified under Chapter 39. This heading also includes metal corks and metal seals, but excludes separately presented metal foil or composite packaging materials. First 2 digits 83: Chapter 83, miscellaneous articles of base metal. Digits 3-4 09: heading 8309, specifically base metal stoppers, caps, bottle caps, screw caps, seals and other packing accessories. Digits 5-6 10: subheading 830910, specifically bottle caps, i.e., metal caps used for sealing bottles, typically crown caps. Note that subheading 8309.10 only covers bottle caps, while other stoppers and caps (such as can lids, tube caps) fall under 8309.90. Therefore, the complete code 830910 means base metal bottle caps. The product is a metal bottle cap used for sealing bottles, meeting the description of heading 8309. It is not classified under 8308 (base metal beads, spangles) or 8310 (sign plates), nor under Chapter 82 tools. If it were a plastic bottle cap, it would be classified under 3923; if it were an aluminum foil sealing film, under 7607. Because it is made of base metal and specially used for bottles, it is classified under 830910.

Material: Declare the specific base metal material of the bottle cap, such as tinplate, aluminum, steel, etc., and whether it has a plastic liner or rubber gasket. Type: Declare the specific type of bottle cap, such as crown cap, screw cap, tamper-evident cap, easy-open lid, etc. Use: Declare the container type to which the bottle cap applies, such as glass bottle, plastic bottle, metal can, and the specific contents (beverages, pharmaceuticals, etc.). Brand: Declare the brand or manufacturer name of the bottle cap; if no brand, state 'unbranded'. Specifications and dimensions: Declare the diameter, height and other dimensions of the bottle cap, usually expressed in millimeters. Whether printed with text or patterns: Declare whether the surface of the bottle cap is printed with text, logo or patterns, which affects whether intellectual property rights are involved. Packaging method: Declare the packaging form of the bottle cap, such as bulk, boxed, bagged, etc. Customs declaration item: Product name: Metal bottle cap Specifications and model: Tinplate|Crown cap|For glass bottled beer|Brand: XX|Diameter 26mm|Printed with XX trademark|Bulk HS code: 83091000 Declaration elements: 1. Material: tinplate; 2. Type: crown cap; 3. Use: for glass bottled beer; 4. Brand: XX; 5. Specifications and dimensions: diameter 26mm; 6. Whether printed with text or patterns: yes, printed with XX trademark; 7. Packaging method: bulk. False material declaration: reporting an aluminum bottle cap as tinplate, affecting classification and tax rate. Type confusion: reporting a can lid (such as easy-open lid) as a bottle cap, which should be classified under 830990. Vague use description: not specifying the container, which may cause customs questioning. Ignoring liner material: if it contains a plastic liner, it may affect classification (still 8309, but must be declared). Brand infringement risk: not declaring a printed trademark may lead to seizure.

Core classification basis: 1) Material is base metal; 2) Function is bottle cap, used for sealing bottles; 3) Not more specifically named in other chapters. According to HS notes, 8309 includes crown caps, screw caps, etc. If a bottle cap has plastic parts, as long as base metal constitutes the essential character, it is still classified under 8309. If the bottle cap is made of plastic, it is classified under 3923. If it is an aluminum foil sealing film, under 7607. If it is a composite article (such as a bottle cap with a bottle opener), classify according to the main function. 830990 Other stoppers, caps: 830990 covers stoppers and caps other than bottle caps, such as can lids, tube caps, drum lids, etc. Bottle caps specifically refer to small caps used for bottles, usually with a smaller diameter. 392350 Plastic stoppers, caps: Material is plastic; even if similar in shape to a bottle cap, it is classified under 3923. If a plastic cap has a metal sheet, determine by essential character. 760719 Aluminum foil: Aluminum foil sealing film without support is classified under 7607. If aluminum foil is laminated onto a bottle cap, classify as a bottle cap. 820559 Bottle opener: A bottle opener is a tool, classified under 8205. If a bottle cap is attached to a bottle opener, classify according to the main use, usually still a bottle cap. 848079 Molds: Molds used to manufacture bottle caps are classified under 8480, not the bottle caps themselves. Is the material base metal? Is it specially used for sealing bottles? Does it contain plastic parts? Does it have other tool functions? Is it confused with a can lid?

How to check the tax rate for HS code 830910? The tax rate must be checked according to the destination country's customs tariff. For exports from China, check the Customs Import and Export Tariff of the People's Republic of China; for the United States, check HTSUS; for the EU, check TARIC. Note that rates change, so it is recommended to use official databases or consult a customs broker. What is the difference in HS codes between metal bottle caps and plastic bottle caps? Metal bottle caps are classified under 830910, plastic bottle caps under 392350. If a cap is a combination of metal and plastic, classify according to essential character; usually if the metal part constitutes the essential character, it is classified under 8309. Does a bottle cap with a tamper-evident ring affect classification? No, the tamper-evident ring is part of the bottle cap and remains classified under 830910. However, it must be noted in the declaration. Are crown caps and screw caps the same code? Yes, both are classified under 830910 because both are base metal bottle caps. However, the type must be noted in the declaration elements. How to declare a bottle cap with a rubber liner? The liner material must be noted in the declaration, such as 'with rubber gasket'. Classification remains 830910, but detailed information is required if it affects origin or tax rate. What certifications are needed to export bottle caps to the EU? They must comply with EU food contact materials regulations (such as EU 10/2011), and a declaration of conformity may be required. Specific certification depends on use; consult a professional agency. What should be noted when declaring a bottle cap printed with a brand logo? The brand must be declared; if it is a well-known brand, an authorization letter is required to avoid infringement. Customs may check intellectual property recordal. If the bottle cap is used for pharmaceutical packaging, is the HS code different? It is still classified under 830910, but pharmaceutical packaging regulations may apply and relevant certificates may be required. The HS code does not change due to use, unless it is special pharmaceutical packaging machinery.