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HSChapter 55
U.S. imports of synthetic staple fibers of nylon or other polyamides (except aramids), not carded or combed (HS 550319) totaled $636K in April 2026, traded with 8 countries.
Importers of Synthetic Staple Fibers of Nylon or Other Polyamides (Except Aramids), Not Carded or Combed paid $77K in duties in April 2026 — an effective duty rate of 13% on $578K in dutiable value, based on actual customs collections rather than the published tariff schedule.
Last updated: April 2026 dataNylon and non-aramid polyamide staple fibers in unprocessed form are widely used in carpet yarn, apparel blends, and technical textiles, with the US schedule subdividing them by nylon 12 content thresholds at the 10-digit level. Line 5503191000 captures fibers containing more than 10% nylon 12, while 5503199000 covers other non-aramid polyamide staple fibers; a third line (5503190000) serves as a general catch-all. Germany leads US imports under this heading, followed by Switzerland and Canada.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
Nylon 12 (polyamide 12) has distinct chemical and mechanical properties — including lower moisture absorption and higher chemical resistance — compared to nylon 6 or nylon 6,6. The US tariff schedule uses a 10% nylon 12 content threshold to separate specialty high-nylon-12 fibers (5503191000) from standard polyamide staple fibers (5503199000). Importers should obtain a fiber composition certificate from the manufacturer to determine which 10-digit line applies.
Canada is a USMCA partner, and qualifying goods of Canadian origin may be eligible for preferential tariff treatment provided the fiber meets the applicable textile rules of origin under USMCA. Given that Canada ranks among the top three suppliers under this heading, importers should work with a licensed customs broker to confirm USMCA eligibility and obtain the necessary origin certification.
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Monthly import values over time
| Country | Imports | Exports | Balance |
|---|---|---|---|
| SWITZERLAND | $433K | -- | -$433K |
| BRAZIL | -- | $327K | +$327K |
| DOMINICAN REPUBLIC | -- | $321K | +$321K |
| PAKISTAN | -- | $258K | +$258K |
| MEXICO | -- | $219K | +$219K |
HS10 import codes under this HS6 parent. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Import Value | Effective Tariff % | Duty Collected |
|---|---|---|---|---|
| 5503199000 | SYN STP FIB NT PRSD SPNG:OTH LT 10% NY 12, EXC ARA | $501K | 14.30% | $63K |
| 5503191000 | SYN STP FIB NT CD,PRSD SPNG:CON GT10% NYL 12,NESOI | $135K | 10.00% | $13K |
SYN STP FIB NT PRSD SPNG:OTH LT 10% NY 12, EXC ARA
SYN STP FIB NT CD,PRSD SPNG:CON GT10% NYL 12,NESOI
HS10 export codes under this HS6 parent. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 5503190000 | SYN STP FIB NT CRD, NYL/ OT PLYM, NOT OF ARAMIDS | $2.3M |
SYN STP FIB NT CRD, NYL/ OT PLYM, NOT OF ARAMIDS
337.2K 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 |
|---|---|---|---|
| Delaware | -- | $1.1M | +$1.1M |
| South Carolina | $569K | $172K | -$397K |
| Florida | -- | $559K | +$559K |
| Port | Imports | Exports | Balance |
|---|---|---|---|
| CHARLESTON, SC | $569K | $261K | -$308K |
| NORFOLK-NEWPORT NEWS, VA | -- | $701K | +$701K |
| PHILADELPHIA, PA | -- | $327K | +$327K |