Chapter 73 covers articles of iron or steel, including tubes, profiles, wire, plates and other semi-finished and finished products, but excludes machinery, mechanical appliances, vehicles, ships, etc. of iron or steel (these are classified in Chapter 84, Chapter 87, etc.). This chapter ranges from 7301 to 7326 and involves cast, forged, stamped, welded and other processed articles of iron or steel, and is a commonly seen chapter for metal products in international trade. Heading 7318 specifically covers screws, bolts, nuts, washers, rivets, pins, cotter pins, keys, washers and similar fasteners of iron or steel. These goods are usually used for mechanical connection, fastening or sealing, and are made of iron or steel (including stainless steel), but exclude fasteners of copper or aluminum (classified in Chapter 74 or 76). The first 2 digits 73 indicate Chapter 73, articles of iron or steel; digits 3-4, 18, indicate heading 7318, i.e. fasteners of iron or steel; digits 5-6, 29, indicate subheading 7318.29, i.e. other fasteners. This subheading is a residual subheading under heading 7318, covering fasteners of iron or steel not elsewhere specified, such as non-threaded pins, keys, spring pins, etc. Note: under 7318 there are also 7318.11 (wood screws), 7318.12 (self-tapping screws), 7318.13 (screws and bolts), 7318.14 (self-tapping screws), 7318.15 (other screws and bolts), 7318.16 (nuts), 7318.19 (other threaded articles), 7318.21 (spring washers), 7318.22 (other washers), 7318.23 (rivets), 7318.24 (pins, cotter pins), 7318.29 (other). This product is a fastener of iron or steel, but is neither a threaded article (such as screws, bolts, nuts), nor a washer, rivet or pin, but another type of fastener (such as retaining rings, circlips, connecting pins, etc.), so it is classified under 7318.29. If it were a threaded article, it should be classified under 7318.11-7318.19; if it were a washer, under 7318.21-7318.22; if it were a rivet, under 7318.23; if it were a pin, under 7318.24.

Product name: The specific name of the declared commodity, such as "retaining ring", "circlip", "connecting pin", etc., and should accurately reflect the nature of the commodity. Material: Declare the specific type of iron or steel, such as "stainless steel", "carbon steel", "alloy steel", etc., and indicate the grade (such as 304). Use: Explain the use of the commodity, such as "for automobile engine fastening", "for mechanical connection", etc. Specifications and dimensions: Declare the dimensions of the commodity, such as diameter, length, thickness, etc., usually in millimeters. Brand: Declare the brand or trademark of the commodity; if there is no brand, declare "no brand". Model: Declare the model or part number of the commodity to facilitate identification of the specific commodity. Processing technique: Explain the processing method of the commodity, such as "forging", "stamping", "turning", etc. Product name: stainless steel retaining ring; Material: stainless steel 304; Use: for fixing automobile transmission bearings; Specifications: outer diameter 50mm, inner diameter 45mm, thickness 2mm; Brand: ABC; Model: DC-1234; Processing technique: stamping. Incorrectly classifying threaded articles under 7318.29; they should be classified under 7318.11-7318.19. Incorrectly classifying washers under 7318.29; they should be classified under 7318.21 or 7318.22. Incorrectly classifying rivets under 7318.29; they should be classified under 7318.23.

The core criteria for classification are: 1. The material is iron or steel; 2. It is a fastener (used for connection or fastening); 3. It is not a threaded article, washer, rivet or pin. If the above conditions are met, it is classified under 7318.29. If it is a threaded article, it is classified under 7318.11 to 7318.19 according to the specific type; if it is a washer, under 7318.21 or 7318.22; if it is a rivet, under 7318.23; if it is a pin, under 7318.24. 731815 Other screws and bolts: 731815 covers threaded articles, such as screws and bolts; while 731829 covers other non-threaded fasteners, such as retaining rings and circlips. 731822 Other washers: 731822 covers washers, used to distribute pressure or seal; 731829 covers other fasteners, such as retaining rings, used for axial fixing. 731823 Rivets: 731823 covers rivets, used for permanent connection; 731829 covers other removable fasteners. 731824 Pins, cotter pins: 731824 covers pins, used for positioning or connection; 731829 covers other fasteners, such as retaining rings, with different functions. 732690 Other articles of iron or steel: 732690 covers other articles of iron or steel not elsewhere specified, not dedicated fasteners; 731829 covers dedicated fasteners. Is the material iron or steel? Is it a fastener? Is it a non-threaded article? Is it not a washer, rivet or pin? Is it not listed under other subheadings of 7318?

What commodities are specifically included in "other fasteners" under HS code 731829? It includes retaining rings, circlips, spring pins, connecting pins, keys, split pins and other fasteners of iron or steel that are non-threaded, non-washer, non-rivet and non-pin. However, note that if a pin-type product meets the description of 731824, it should be classified under 731824. How to distinguish between 731829 and 731824 (pins)? 731824 specifically covers pins and cotter pins, such as cylindrical pins, taper pins, split pins, etc. 731829 covers other fasteners, such as retaining rings, circlips, etc. If the commodity is a pin, it should be classified under 731824 first. Which code should a stainless steel retaining ring be classified under? A stainless steel retaining ring belongs to other fasteners, and if it is a non-threaded article, it should be classified under 731829. However, it is necessary to confirm whether it is a washer (such as spring washers under 731821 and other washers under 731822). Retaining rings are usually used for axial fixing and are not washers, so they are classified under 731829. What key declaration elements are required when declaring 731829? Product name, material, use, specifications and dimensions, brand, model, processing technique, etc. are required. The material should indicate the specific steel type, the use should be specific, and the specifications and dimensions should be complete, so that customs can classify accurately. How to check the tariff rate for 731829? You can check the latest tariff rate by entering HS code 731829 on the official website of the General Administration of Customs, China International Trade Single Window, or third-party query platforms. Note that tariff rates may vary by country, trade agreement, etc., and need to be determined in combination with the country of origin. If the commodity is a copper fastener, which code should it be classified under? Copper fasteners should be classified under Chapter 74, specifically 7415 (copper fasteners). If aluminum, under Chapter 76, 7616. 731829 applies only to fasteners of iron or steel. How to distinguish between 731829 and 732690 (other articles of iron or steel)? 731829 specifically refers to fasteners of iron or steel, with connection and fastening functions; 732690 covers other articles of iron or steel not elsewhere specified, such as iron or steel brackets, housings, etc. If the commodity is clearly a fastener, it should be classified under 731829. What should cross-border e-commerce sellers pay attention to when exporting goods under 731829? They should pay attention to correctly declaring the product name and material to avoid customs clearance delays caused by classification errors. At the same time, they should understand the tariff policies of the destination country, such as the additional tariffs imposed by the United States on iron and steel products, and calculate costs in advance.