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HSChapter 54
U.S. imports of sewing thread of synthetic filaments (HS 540110) totaled $5.3M in April 2026, traded with 39 countries.
Importers of Sewing Thread of Synthetic Filaments paid $696K in duties in April 2026 — an effective duty rate of 15% on $4.6M in dutiable value, based on actual customs collections rather than the published tariff schedule. Sewing Thread of Synthetic Filaments imports of $5.3M in April 2026 ran 48% above the year-to-date monthly average of $3.6M.
Last updated: April 2026 dataPolyester and nylon sewing threads — the dominant synthetic filament types in global apparel and industrial stitching — are classified here whether sold on retail spools or in bulk industrial cones. Mexico leads US imports under this heading, a position reinforced by USMCA proximity and integrated North American apparel supply chains, with Japan and China also significant sources. A single 10-digit line (5401100000) covers all retail and non-retail presentations, so classification turns primarily on confirming the filament type is synthetic (as opposed to artificial/regenerated filaments, which fall under 540120) and that the product is specifically a sewing thread rather than a general-purpose yarn.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
Synthetic filaments are polymer-based fibers such as polyester, nylon, and polypropylene, while artificial (regenerated) filaments are derived from natural cellulose — viscose rayon and cupro being the primary examples. The fiber chemistry, not the thread's appearance or end use, determines which heading applies. A fiber content certificate from the manufacturer is the standard supporting document.
No. The heading explicitly covers sewing thread 'whether or not put up for retail sale,' and the single 10-digit line 5401100000 applies regardless of packaging format. However, retail packaging may trigger separate marking and labeling requirements under the Textile Fiber Products Identification Act, which importers should address independently of the tariff classification.
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Monthly import values over time
| Country | Imports | Exports | Balance |
|---|---|---|---|
| MEXICO | $523K | $4.5M | +$4.0M |
| JAPAN | $2.8M | $63K | -$2.7M |
| CANADA | $48K | $514K | +$466K |
| VIETNAM | $466K | $9K | -$457K |
| CZECH REPUBLIC | $346K | -- | -$346K |
HS10 import codes under this HS6 parent. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Import Value | Effective Tariff % | Duty Collected |
|---|---|---|---|---|
| 5401100000 | SEWING THREAD SYNTHETIC FILAMENTS, FOR RETAIL SALE | $5.3M | 15.00% | $696K |
SEWING THREAD SYNTHETIC FILAMENTS, FOR RETAIL SALE
HS10 export codes under this HS6 parent. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 5401100000 | SEWING THREAD SYNTHETIC FILAMENTS, FOR RETAIL SALE | $6.0M |
SEWING THREAD SYNTHETIC FILAMENTS, FOR RETAIL SALE
383.0K kg
SYNTHETIC FILAMENT YARN FABRIC FROM THE STRIP
HS 540720
SYN FIL YARN EX SEWING NO RETAIL, POLYESTER
HS 540220
SYNTHETIC STRIP WIDTH NOT > 5MM
HS 540490
SYN FIL YN EXSEW NO RT TX POLYESTER
HS 540233
SYNT FILMT YRN, HIGH TENACITY YARN OF ARAMIDS
HS 540211
SYNT YARN,HIGH TENACTY, NYLON/ OTHR POLYAMIDES,NES
HS 540219
| State | Imports | Exports | Balance |
|---|---|---|---|
| Nevada | $2.5M | -- | -$2.5M |
| North Carolina | $522K | $1.5M | +$998K |
| Texas | $315K | $1.6M | +$1.2M |
| Port | Imports | Exports | Balance |
|---|---|---|---|
| LOS ANGELES, CA | $2.8M | -- | -$2.8M |
| LAREDO, TX | $408K | $2.0M | +$1.6M |
| YSLETA, TX | $244K | $864K | +$620K |