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SITCSection 5
U.S. imports of polyamide-6, -11, -12, -6,6, -6,9, -6,10 & -6,12 in primary forms (SITC 57531) totaled $39.5M in April 2026, traded with 33 countries.
Importers of Polyamide-6, -11, -12, -6,6, -6,9, -6,10 & -6,12 in Primary Forms paid $2.0M in duties in April 2026 — an effective duty rate of 7.8% on $26.1M in dutiable value, based on actual customs collections rather than the published tariff schedule. Polyamide-6, -11, -12, -6,6, -6,9, -6,10 & -6,12 in Primary Forms imports of $39.5M in April 2026 ran 14% above the year-to-date monthly average of $34.7M.
Last updated: April 2026 dataNylon engineering resins — including the widely used PA-6 and PA-6,6 grades — are foundational inputs for automotive components, electrical connectors, industrial fibers, and consumer goods. Each numeric suffix denotes a distinct monomer chain length and property profile: PA-6,6 offers higher melting points suited to under-hood automotive parts, while PA-12 provides flexibility and chemical resistance for fuel lines and tubing. Importers should verify whether specific grades are subject to Section 301 tariffs, as classification can hinge on molecular weight and form (pellet, powder, flake) declared at entry.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
Classification typically relies on the declared monomer composition and the manufacturer's technical data sheet. PA-6 is derived from caprolactam, while PA-6,6 is produced from hexamethylenediamine and adipic acid; these differences in feedstock and melting point are the key distinguishing criteria examiners use.
Certain polyamide resins originating from specific countries may be subject to Section 301 tariffs. Importers should confirm the applicable tariff action for the specific grade and country of origin with a licensed customs broker before shipment.
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Monthly import values over time