Chapter 84 is a broad category in the HS classification system covering machinery, mechanical appliances, electrical equipment, and parts thereof. This chapter includes power machinery, agricultural machinery, metalworking machine tools, office equipment, automatic data processing equipment, bearings, seals, etc. The core characteristic is that these goods usually have a mechanical function or serve as dedicated parts of machinery, rather than being separately used electrical products (Chapter 85) or general metal articles (Chapter 73). Heading 8484 covers gaskets, washers and similar joints for sealing, usually made of metal sheet combined with other materials or made of multiple layers of metal. Specifically, it includes metal gaskets, combination gaskets (such as composites of metal with rubber, asbestos, graphite, etc.), mechanical seals, etc. However, pure metal washers that only serve a fastening function are classified under 7318, while this heading specifically refers to sealing joints used to prevent fluid leakage. Code 848410 is a 6-digit subheading. The first 2 digits 84 indicate Chapter 84 (machinery, mechanical appliances and parts thereof); digits 3-4, 84, constitute heading 8484 (gaskets and similar joints for sealing); digits 5-6, 10, indicate subheading 8484.10, specifically referring to metal gaskets. This subheading may be further subdivided (e.g., by material or use), but the 6-digit code is already specific to metal gaskets. Note: if a gasket is composed of multiple materials, as long as metal plays the main sealing role, it is still classified under this subheading. This product is classified under 848410 because its core function is sealing and it is mainly made of metal materials (such as metal sheet, metal wire mesh, metal-graphite composite, etc.). Unlike the fastening washers of 7318 (which only prevent loosening), and unlike the mechanical seals of 848420 (dynamic sealing devices), 848410 specifically refers to metal gaskets for static sealing. If it is a pure rubber or plastic gasket, it is classified under 4016 or 3926.

Product name: The standard name of the declared commodity should be specific and clear, such as "metal gasket" or "stainless steel metal gasket." Material: State the main metal material and whether other materials are included, such as "stainless steel" or "carbon steel + graphite composite." Use: Clearly state the usage scenario, such as "for automobile engines" or "pipeline flange sealing." Structure: Describe the construction of the gasket, such as "single-layer metal sheet," "spiral wound gasket," or "multi-layer metal composite." Brand: Fill in the brand name (if no brand, write "none") for customs intellectual property verification. Model: Fill in the product model or specification to facilitate customs confirmation of the commodity attributes. Contains asbestos: Declare whether it contains asbestos components, involving environmental and safety regulation. Product name: metal gasket; Material: stainless steel + graphite composite; Use: for chemical pipeline flange sealing; Structure: spiral wound type; Brand: XYZ; Model: DN50-PN16; Contains asbestos: no. Mistakenly declaring a pure metal fastening washer as 848410, when it should actually be classified under 7318. Failure to declare non-metal components, leading to incorrect classification or omission of regulatory conditions. Unclear use description, making it impossible to distinguish whether it is a dedicated part or a general seal.

The core criteria for classification are: 1) whether the product is used for sealing to prevent fluid leakage; 2) whether metal is the main material or metal is combined with other materials but metal plays the key sealing role; 3) whether it is a static seal (such as a flange gasket). If it is a dynamic seal (such as a mechanical seal for pumps), it is classified under 848420; if it is a pure rubber or plastic gasket, it is classified under 4016 or 3926; if it is a fastening washer, it is classified under 7318. 848420 Mechanical seals: Mechanical seals are dynamic sealing devices used for rotating shafts and have a complex structure; 848410 is a static sealing gasket used for fixed joint surfaces. 7318 Iron or steel fasteners: The washers of 7318 are mainly used to prevent loosening and do not have a sealing function; the metal gaskets of 848410 are specifically used for sealing. 4016 Vulcanized rubber articles: 4016 includes pure rubber gaskets; if a metal frame is included but rubber is the main sealing material, it may still be classified under 4016. 3926 Plastic articles: 3926 includes pure plastic gaskets; if metal and plastic are combined and metal plays the main role, it is classified under 848410. 848490 Other gaskets: 848490 covers non-metal or otherwise unnamed gaskets; 848410 specifically refers to metal gaskets. Is it used for sealing rather than fastening? Is metal the main sealing material? Is it a static seal? Does it contain sensitive materials such as asbestos? Is it confused with mechanical seals?

How can I check the import tax rate for 848410? You can check the most-favored-nation rate, general rate, VAT rate, etc. by entering HS code 848410 on the official website of the General Administration of Customs, China International Trade Single Window, or professional tariff query tools. Note that tax rates may be adjusted with policy changes, and the latest tariff schedule should prevail. What is the difference in classification between metal gaskets and rubber gaskets? Metal gaskets are classified under 848410, and rubber gaskets are classified under 4016. If it is a metal-rubber composite, it is necessary to determine the main sealing material: if metal plays the main role, classify under 848410; if rubber plays the main role, classify under 4016. What documents must be provided when declaring 848410? Usually, contracts, invoices, packing lists, product manuals, material certificates, etc. are required. If asbestos is contained, a test report must be provided. Specific requirements are subject to customs. What is the difference between 848410 and 848420? 848410 is a static sealing gasket used for fixed joint surfaces such as flanges and pipelines; 848420 is a mechanical seal used for dynamic sealing of rotating shafts in pumps, compressors, etc. The two differ in structure and working principle. If a metal gasket is used in an automobile engine, is it classified under 848410? Yes, as long as it meets the definition of a metal gasket, it is classified under 848410 regardless of whether it is used in automobiles or industrial equipment. However, if it is a part specifically for automobiles and is specifically listed under another heading, that heading may take precedence. What certifications should be noted when exporting metal gaskets to the EU? Attention should be paid to the EU Pressure Equipment Directive (PED), REACH regulations (such as the ban on asbestos), and industry standards required by customers (such as API, DIN). It is recommended to confirm certification requirements with customers in advance. What are common errors in the declaration elements for metal gaskets during customs declaration? Common errors include unclear material description (such as writing only "metal"), overly general use, failure to declare non-metal components, omission of brand and model, etc. These may lead to classification disputes or customs clearance delays. How can I determine whether a metal gasket contains asbestos? You can check the product manual or material report. If it cannot be confirmed, it can be sent to a professional laboratory for testing. Gaskets containing asbestos are prohibited or restricted from import in many countries, so special attention is required.