Chapter 40 covers rubber and articles thereof, including raw materials such as natural rubber, synthetic rubber, and vulcanized rubber, as well as semi-finished and finished products. This chapter classifies products according to the form of rubber (such as plates, sheets, strips, tubes, rods, etc.) and the degree of processing (such as unvulcanized, vulcanized, hard rubber, etc.). Heading 4016 specifically covers articles of vulcanized rubber (other than hard rubber), and 401693 is a subheading under it, involving specific products such as seals. Heading 4016 covers other articles of vulcanized rubber (other than hard rubber), including gaskets, washers, seals, buffers for ships or docks, inflatable articles, etc. Goods under this heading are usually finished products made by molding, extrusion, cutting, and other processes, but exclude hard rubber (4017) and certain special-purpose articles (such as tires, rubber hoses, etc.). 401693 is further limited to gaskets, washers, and other seals, used to prevent fluid leakage. Code 401693 is a 6-digit HS subheading: the first 2 digits "40" represent Chapter 40 (rubber and articles thereof); digits 3-4 "16" represent heading 4016 (other articles of vulcanized rubber); digits 5-6 "93" represent subheading 401693, specifically referring to gaskets, washers, and other seals of vulcanized rubber. There may be further 8-digit or 10-digit codes under this subheading, but the basic 6 digits already clearly define the scope of goods. The level-by-level classification reflects the logic from broad category to specific product: chapter → heading → subheading, facilitating international trade statistics and tariff management. This product is a seal made of vulcanized rubber, belongs to articles of vulcanized rubber, and is not classified under other more specific headings (such as transmission belts under 4010, tires under 4011, etc.). Differences from adjacent codes: other subheadings under 4016 may cover cellular rubber articles (401610) or other articles not elsewhere specified (401699), while 401693 specifically refers to seals; the difference from plastic seals (3926) lies in the material being vulcanized rubber; the difference from hard rubber (4017) lies in the rubber not being hardened. Therefore, classification under 401693 is the most accurate.

Product name: The specific name of the declared commodity, such as "gasket of vulcanized rubber," "rubber sealing ring," etc., which must be consistent with the actual goods. Material: Clearly state that it is vulcanized rubber, and specify the type of rubber (such as nitrile rubber, silicone rubber, etc.) and whether it is hard rubber. Use: Explain the application scenario of the seal, such as "used for automobile engine sealing," "pipe connection sealing," etc. Brand: Fill in the brand name (if there is no brand, fill in "no brand"); the brand must be consistent with the actual goods or packaging. Specifications and model: Fill in parameters such as size, shape, hardness, etc., such as "round, outer diameter 10mm, inner diameter 5mm, thickness 2mm." Processing method: Explain the molding process, such as "compression molding," "extrusion molding," etc. Customs declaration example: Product name: O-ring seal of vulcanized rubber Material: Vulcanized nitrile rubber (NBR), non-hard Use: Used for hydraulic cylinder sealing Brand: NOK Specifications and model: O-type, outer diameter 20mm, inner diameter 15mm, thickness 2.5mm Processing method: Compression molding Quantity: 1000 pieces Unit price: USD 0.5 Total price: USD 500 Origin: Japan Remarks: None Mistakenly classifying hard rubber seals under 401693, when they should actually be classified under 4017. Confusing plastic seals with rubber seals, leading to incorrect classification under 3926. Failure to state "vulcanized" leads to questioning whether it is unvulcanized rubber (classified under 4005, etc.). The declared use is not specific, and customs may require supplementary explanation or reclassification.

The core basis for classification is: 1) the material is vulcanized rubber (non-hard); 2) the function is sealing (gaskets, washers, etc.); 3) it is not more specifically named under other headings. According to General Rules 1 and 6 of HS classification, 401693 is the most specific description. Attention must be paid to the difference between vulcanized rubber and unvulcanized rubber, hard rubber, and the distinction between seals and other rubber articles (such as shock absorbers). 401610 Articles of cellular vulcanized rubber: 401610 is cellular rubber articles, porous in texture; 401693 is solid seals, dense in texture. 401699 Other articles of vulcanized rubber: 401699 is articles of vulcanized rubber not elsewhere specified, such as shock absorbers, handles, etc.; 401693 specifically refers to seals. 392690 Other articles of plastics: 392690 is plastic articles, with a different material; 401693 requires the material to be vulcanized rubber. 4017 Articles of hard rubber: 4017 is articles of hard rubber (such as ebonite), with high hardness; 401693 is soft or semi-hard vulcanized rubber. 848420 Mechanical seals: 848420 is mechanical sealing devices (often containing metal parts), while 401693 is pure rubber seals. Is the material vulcanized rubber and non-hard? Is the function sealing (gaskets, washers, etc.)? Is it not listed under other more specific headings? Is it confused with plastic or hard rubber articles? Are the declaration elements complete and accurate?

How can I check the import tariff rate for 401693? You can check through the official website of the General Administration of Customs of China or the International Trade Single Window. Enter HS code 401693 and the country of origin to obtain the MFN rate, general rate, or agreement rate. Note that tariff rates may be adjusted with policy changes, and the latest published version should prevail. How do you distinguish 401693 from 401699? 401693 specifically refers to gaskets, washers, and other seals of vulcanized rubber, while 401699 is other articles of vulcanized rubber not elsewhere specified. If the product is mainly used for sealing, it should be classified under 401693; if it is for other uses (such as buffering, decoration), it should be classified under 401699. What is the key difference in classification between vulcanized rubber seals and plastic seals? The key difference lies in the material: vulcanized rubber seals are classified under 401693, and plastic seals under 3926. This must be confirmed through material identification to avoid misclassification due to similar appearance. What declaration elements must be provided when declaring 401693? Usually, product name, material, use, brand, specifications and model, processing method, etc. are required. The specific requirements are subject to customs requirements, and it is recommended to refer to the "Catalogue of Specifications for Declaration of Import and Export Commodities of the Customs of the People's Republic of China." How should a 401693 seal with a metal frame be classified? If the metal frame only serves a reinforcing function, it is still classified as a rubber seal under 401693; if it constitutes a mechanical sealing device, it may be classified under 848420. Judgment should be based on the overall characteristics. How can I check the tariff for 401693 products exported to the United States? You can check the HTS code of the United States International Trade Commission (USITC). The U.S. tariff number corresponding to 401693 may be 4016.93.50, etc. The specific rate must be determined according to the latest version of the HTSUS and trade policy. Are products under 401693 subject to anti-dumping duties? Some rubber seals may be subject to anti-dumping measures, such as products from specific countries. It is recommended to check the China Trade Remedy Information Network or consult a professional customs broker to confirm whether anti-dumping duties apply. Can cross-border e-commerce small parcels exporting rubber seals be declared in a simplified manner? Cross-border e-commerce small parcels are usually declared in a simplified manner as personal items or low-value goods, but the HS code still needs to be provided. If the quantity is large, it is recommended to declare under general trade to ensure accurate classification.