Code Classification
Global customs codes classify synthetic filament yarn for tariff assessment and statistical tracking across international borders. Allocation under harmonized system heading 5402 designates single, multiple, cabled, or textured synthetic filament yarns, including nylon, polyester, and polypropylene, that are not put up for retail sale. This code governs the duty rates applied to bulk raw materials used by knitting and weaving mills.
Subheading Separation
Detailed subheadings within this code separate the yarn by polymer type, cross-section, and texturing status. High-tenacity nylon yarns used in industrial fabrics are distinguished from the textured polyester yarns used in apparel. This specificity allows customs authorities to monitor trade volumes of critical manufacturing inputs and apply targeted trade remedies.
Commercial Impact
Apparel brands face different duty liabilities depending on the precise classification of their yarn inputs. If a mill uses monofilament yarn instead of multifilament, the classification shifts to a different code entirely. This change can alter the import duty rate by several percentage points, directly impacting the final garment cost.
Verification Rule
Customs auditors verify the classification by conducting laboratory tests on the yarn structure to confirm the decitex and filament count. The importing party must present a certificate of analysis from the spinning mill that confirms these physical properties. When these parameters deviate from the declared tariff heading, customs officials reclassify the goods, which can result in unexpected tariff increases and cargo delays.
This process is the primary defense against improper tariff evasion by yarn importers.
