Circlip Hs Code

Circlip harmonized system code

Product Overview A circlip classified under HS Code 731829 is a precision-engineered retaining ring typically manufactured from high-grade carbon steel or stainless steel, designed to fit into a machined groove on a shaft or bore, providing axial retention of components. These circlips are characterized by their circular cross-section with open ends, enabling secure snap-fit installation. Key physical specifications include diameters ranging from 5 mm to over 200 mm, thickness tolerances within ±0.05 mm, and surface finishes often treated with anti-corrosive coatings such as zinc plating or passivation. The product category under HS 731829 encompasses various subtypes, including internal and external circlips, spiral circlips, and other ring-shaped fasteners not elsewhere specified. These components are essential in mechanical assemblies across food service equipment, retail machinery, and processing industries, where reliable component retention under dynamic loads is critical. Market positioning emphasizes their precision dimensional conformity, corrosion resistance, and compliance with international mechanical standards, offering importers and manufacturers a durable and cost-effective solution within competitive global supply chains. HS Code Classification & Trade Specifications HS Code 731829 falls under Chapter 73: “Articles of Iron or Steel,” specifically within Heading 7318, which covers “Other screw machine products of iron or steel.” The six-digit classification breaks down as follows: 73 (Chapter: Iron and Steel), 18 (Heading: Screwmachine products), and 29 (Subheading: Circlips and other circlip-type retaining rings). This classification is justified by the product’s manufacturing process involving precision machining and forming of metal wire or strip to exact dimensions for mechanical fastening purposes. Trade considerations include packaging in bulk quantities, typically in moisture-resistant, corrosion-inhibiting cartons or metal tins, with desiccant inserts to maintain product integrity during transit. Preservation standards require compliance with ISO 9227 salt spray test benchmarks for corrosion resistance, ensuring durability throughout shipping and storage. Shipping requirements align with international freight protocols, emphasizing secure containment to prevent deformation. Quality standards adhere to ISO 13918 and DIN 471/472 specifications, supporting customs compliance and facilitating accurate tariff classification under WTO guidelines, thereby streamlining clearance and minimizing trade disputes for importers, customs brokers, and regulatory authorities.

Circlip Chapter Note

1.- In this Chapter the expression “cast iron” applies to products obtained by casting in which iron predominates by weight over each of the other elements and which do not comply with the chemical composition of steel as defined in Note 1 (d) to Chapter 72. 2.- In this Chapter the word “wire” means hot or cold-formed products of any cross-sectional shape, of which no cross-sectional dimension exceeds 16 mm.