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U.S. imports of sewing thread of synthetic staple fibers (HS 550810) totaled $921K in July 2026, traded with 29 countries.
Importers of Sewing Thread of Synthetic Staple Fibers paid $214K in duties in July 2026 — an effective duty rate of 30% on $715K in dutiable value, based on actual customs collections rather than the published tariff schedule. Sewing Thread of Synthetic Staple Fibers imports of $921K in July 2026 ran 13% above the year-to-date monthly average of $816K.
Last updated: July 2026 dataSewing thread spun from synthetic staple fibers — most commonly polyester or nylon staple — serves the apparel, footwear, and home-furnishings industries as a high-volume consumable. The US tariff line 5508100000 covers this product whether or not it is put up for retail sale, meaning both industrial cones and consumer retail spools enter under the same classification. Thread specifications such as ticket number, twist direction, and finish coating are commercially significant but do not create separate tariff lines at the 10-digit level.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
185 shipments/mo
Sewing thread spun from staple fibers (short, discrete fiber lengths) falls under heading 5508, while thread made from continuous filament yarn is classified under heading 5401. The distinction is based on the yarn construction method: staple-spun thread has a characteristic hairiness and texture, whereas filament thread is smoother. Importers should confirm the yarn construction type with the manufacturer to ensure correct classification.
Under HTS 5508100000, the duty rate is the same regardless of whether the thread is on industrial cones or retail spools. However, retail packaging may trigger additional labeling requirements under the Textile Fiber Products Identification Act, which requires fiber content, country of origin, and manufacturer identification on consumer-facing packaging. Industrial shipments on large cones are generally exempt from retail labeling rules.
HSChapter 55
Subheading 1 of 2 in heading 5508
Subheading 550810 · $921K of $1.1M
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HS10 import codes under this HS6 parent, each with its own page. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Import Value | Effective Tariff % | Dutiable Share | Duty Collected |
|---|---|---|---|---|---|
| 5508100000 | Sew Thd Mmf Stpl Fib Wth Nt Retail Sale Syn Stp Fb | $1.1M | 25.68% | 88.99% | $270K |
HS10 export codes under this HS6 parent, each with its own page. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 5508100000 | Sew Thd Mmf Stpl Fib Wth Nt Retail Sale Syn Stp Fb | $855K |
Import lines come from the U.S. Harmonized Tariff Schedule and export lines from Schedule B. The two are numbered by different agencies, so the same 10-digit code can appear in both tables describing a different product.
ImportsExports
Imports
$921KYoY · Pro
Exports
$941KYoY · Pro
12-mo low · imports
YoY · ProThrough July 2026. Source: U.S. Census Bureau.
Imports · July 2026
origin
Mexico and China together supply 62% of it.
customs district
destination
entry
rate provision · imports
22.4% enters free of duty; the effective duty rate is 23.22%.