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HSChapter 55
U.S. imports of artificial staple fiber yarn mixed with other fibers (nesoi), not for retail sale (under 85% artificial staple fibers) (HS 551090) totaled $663K in April 2026, traded with 13 countries.
Importers of Artificial Staple Fiber Yarn Mixed with Other Fibers (NESOI), Not for Retail Sale (Under 85% Artificial Staple Fibers) paid $53K in duties in April 2026 — an effective duty rate of 22% on $239K in dutiable value, based on actual customs collections rather than the published tariff schedule. Artificial Staple Fiber Yarn Mixed with Other Fibers (NESOI), Not for Retail Sale (Under 85% Artificial Staple Fibers) imports of $663K in April 2026 ran 82% above the year-to-date monthly average of $364K.
Last updated: April 2026 dataArtificial staple fiber yarns blended with fibers other than wool, fine animal hair, or cotton — and below the 85% artificial fiber threshold — occupy this residual NESOI heading, which captures specialty constructions such as viscose-linen, modal-silk, or artificial-synthetic blends not covered by more specific subheadings. Canada leads US supply, with Indonesia, India, and Germany also among top sources. Four 10-digit lines (5510900000, 5510902000, 5510904000, 5510906000) subdivide the heading by secondary fiber type and yarn construction, making precise fiber identification and structural documentation essential for correct classification.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
The four lines — 5510900000, 5510902000, 5510904000, and 5510906000 — reflect distinctions by secondary fiber type (e.g., synthetic fibers as the blending partner) and yarn construction (single vs. multiple/cabled). Importers should obtain the manufacturer's fiber composition certificate and spinning specification sheet to confirm both the blend percentages and the twist/ply structure before selecting the correct 10-digit line.
When both artificial and synthetic staple fibers are present, the classification depends on which fiber type predominates by weight. If synthetic fibers exceed artificial fibers, the yarn may belong under a Chapter 5509 heading rather than 551090. CBP can request laboratory fiber analysis to verify composition, and a misclassification can result in duty underpayment, penalties, and delays — making pre-import fiber testing a worthwhile investment for complex blends.
Monthly import values over time
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| Country | Imports | Exports | Balance |
|---|---|---|---|
| CANADA | $424K | -- | -$424K |
| GERMANY | $187K | -- | -$187K |
| DOMINICAN REPUBLIC | -- | $127K | +$127K |
| BELGIUM | -- | $26K | +$26K |
| INDIA | $20K | -- | -$20K |
HS10 import codes under this HS6 parent. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Import Value | Effective Tariff % | Duty Collected |
|---|---|---|---|---|
| 5510906000 | YRN NT SWG THD ART STP FIB NT RT SL OTH YRN NESOI | $614K | 23.20% | $44K |
| 5510902000 | YRN N SWG TH ART ST FB N RT SL OT YR M SYN FB SN Y | $48K | 19.00% | $9K |
| 5510904000 | YRN N SWG TH ART ST FB N RT SL OT YR M SYN F M/C F | $0 | -- | -- |
YRN NT SWG THD ART STP FIB NT RT SL OTH YRN NESOI
YRN N SWG TH ART ST FB N RT SL OT YR M SYN FB SN Y
YRN N SWG TH ART ST FB N RT SL OT YR M SYN F M/C F
HS10 export codes under this HS6 parent. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 5510900000 | YRN NT SWG THD ART STP FIB NT RTL SL OT YRN NESOI | $153K |
YRN NT SWG THD ART STP FIB NT RTL SL OT YRN NESOI
36.6K kg
SYN STP FIB NT CRD, CMB OR PRSD SPNG, OF POLYESTER
HS 550320
ARTIF STP FIB NT CRD, CMB OR PRSD SPNG, VIS RAYON
HS 550410
YRN N SW TH MM ST FIB RT SL SYN STP FIB >=85% S FB
HS 551110
STPL FIB ARAMIDS NOT CARD/COMBD/PRCSD FOR SPINNING
HS 550311
SYN STP FIB NT CRD, CMB OR PRSD SPNG, ACRY/MODACRY
HS 550330
SYN STP FIB NOT CARD, CMB OR PRSD SPNG, NESOI
HS 550390
| State | Imports | Exports | Balance |
|---|---|---|---|
| North Carolina | $283K | $127K | -$156K |
| Georgia | $187K | -- | -$187K |
| Vermont | $161K | -- | -$161K |
| Port | Imports | Exports | Balance |
|---|---|---|---|
| ALEXANDRIA BAY, NY | $263K | -- | -$263K |
| SAVANNAH, GA | $187K | -- | -$187K |
| HIGHGATE SPRINGS-ALBURG, VT | $161K | -- | -$161K |