Harmonized System
U.S. imports of Nylon Filament Yarn, Single, Twisted Over 50 Turns/Meter, Not for Retail Sale (HS 540251) totaled $44K in September 2026, imported from 12 countries.
Nylon Filament Yarn, Single, Twisted Over 50 Turns/Meter, Not for Retail Sale imports of $44K in September 2026 ran 55% below the year-to-date monthly average of $99K.
Last updated: September 2026 dataHigh-twist nylon filament yarn — exceeding 50 turns per meter — is engineered for applications requiring enhanced fabric cover, crêpe effects, or improved abrasion resistance, distinguishing it from low-twist industrial nylon yarns. The entire heading resolves to a single 10-digit line (5402510000), simplifying classification but placing the burden of twist-count verification squarely on the importer. India leads US supply under this heading, with Canada and Mexico also significant sources; imports from Canada and Mexico may benefit from USMCA preferential treatment where applicable rules of origin are met. Buyers sourcing from India should monitor any applicable trade-remedy proceedings affecting nylon yarn.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
4 import shipments a month
Crêpe-weave fabrics, hosiery, and fine knitted outerwear often specify high-twist nylon to achieve the characteristic pebbled surface texture and improved drape. The elevated twist level increases yarn torque, which, when woven or knitted, creates the crinkled effect. Technical and performance apparel producers also use high-twist nylon for its enhanced abrasion resistance relative to low-twist constructions.
CBP may require laboratory twist-count testing per standard textile methods (such as ASTM D1422 or equivalent ISO procedures) to confirm that yarn exceeds 50 turns/m and thus belongs in 5402510000 rather than the lower-twist nylon lines. Importers should request mill test certificates documenting twist level and retain them as part of the entry record.
Subheading 20 of 22 in heading 5402
Subheading 540251 · $44K of $62.2M
Trade Directory
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Imports · September 2026
origin
France and China together supply 95% of it. China pays 46.3% duty; France 10.0%.
customs district
destination
entry
rate provision · imports
duty collected equals 18.74% of imports for consumption.
ImportsExports
Imports
$44KYoY · free account
Exports
—YoY · free account
12-mo low · imports
Low · free accountOver the twelve months to September 2026, the U.S. imported $1.1M of Nylon Filament Yarn, Single, Twisted Over 50 Turns/Meter, Not for Retail Sale.
Fewer than 6 of the last 12 months reported trade, or the latest month was under $500K; the trend chart is not shown for thin series.
Through September 2026 · exports 9 of 12 months reported. Source: U.S. Census Bureau.
HS10 import codes under this HS6 parent, each with its own page. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Imports for consumption | Average duty rate | Dutiable Share | Duty Collected |
|---|---|---|---|---|---|
| 5402510000 | Nylon Filament Twst >50 Turns/M | $83K | 10.46% | 100.00% | $9K |