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SITCSection 6
U.S. imports of sewing thread of synthetic staple fibers (SITC 65143) totaled $892K in April 2026, traded with 26 countries.
Importers of Sewing Thread of Synthetic Staple Fibers paid $228K in duties in April 2026 — an effective duty rate of 30% on $759K in dutiable value, based on actual customs collections rather than the published tariff schedule. Sewing Thread of Synthetic Staple Fibers imports of $892K in April 2026 ran 25% above the year-to-date monthly average of $712K.
Last updated: April 2026 dataSpun sewing thread manufactured from short-cut synthetic staple fibers — predominantly polyester staple — twisted together to form a yarn with a softer hand and more matte appearance than filament-based synthetic threads. Polyester staple sewing thread is widely used in apparel, home textiles, and leather goods where a cotton-like surface texture is preferred but synthetic durability is required. Covered whether packaged for retail sale or supplied in bulk industrial formats, this thread type competes directly with cotton sewing thread in many mid-market apparel applications.
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Spun polyester staple thread combines the soft, matte appearance of cotton thread with the strength and colorfastness of polyester, making it a versatile choice for apparel where seam visibility matters aesthetically. It outperforms cotton in resistance to mildew, UV degradation, and repeated washing, while its spun construction reduces the risk of seam puckering compared to high-tenacity filament threads. For manufacturers producing mid-market garments at scale, it often represents the best balance of cost, performance, and appearance.
Each thread type must be classified and entered separately under its respective SITC and HTS heading — synthetic staple and synthetic filament sewing threads are distinct classifications. Mixed shipments require itemized commercial invoices and packing lists that clearly identify the quantity, weight, and construction type (staple vs. filament) of each product line. Commingling without clear documentation can lead to CBP reclassification of the entire shipment under the higher-duty heading.
| Country | Imports | Exports | Balance |
|---|---|---|---|
| MEXICO | $130K | $485K | +$356K |
| CHINA | $263K | -- | -$263K |
| INDIA | $114K | -- | -$114K |
| CAMBODIA | $101K | -- | -$101K |
| EL SALVADOR | -- | $99K | +$99K |
Monthly import values over time
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