Harmonized System
U.S. exports of Other Synthetic Filament Yarn, Single, Untwisted or ≤50 Turns/Meter, Not for Retail Sale (NESOI) (HS 540249) totaled $4.2M in August 2026.
Importers of Other Synthetic Filament Yarn, Single, Untwisted or ≤50 Turns/Meter, Not for Retail Sale (NESOI) paid $886K in duties in August 2026, an average duty rate of 36.76% — duty actually collected as a share of the imports that cleared customs, not the published tariff schedule. Other Synthetic Filament Yarn, Single, Untwisted or ≤50 Turns/Meter, Not for Retail Sale (NESOI) imports of $2.5M in August 2026 ran 27% above the year-to-date monthly average of $2.0M.
Last updated: August 2026 dataCovering synthetic filament yarns other than nylon, polyester, and polypropylene — including polyethylene and specialty polymer yarns — this residual heading captures technically advanced and niche-application products not elsewhere specified. Eight 10-digit lines (including 5402490115, 5402490140, 5402490175, 5402491100, 5402499115, 5402499140, 5402499175, and 5402499180) differentiate by fiber type (polyethylene versus other synthetics), filament count, twist level, decitex, and end-use (e.g., wig yarn). China is the leading US supplier, with Japan, the Netherlands, Germany, and Austria also notable sources — a supplier mix that reflects both commodity polyethylene yarn and high-value specialty filaments from European producers. Section 301 tariffs apply to imports from China, adding a cost layer that importers must factor into sourcing decisions.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
46 import shipments a month
Lines 5402490115, 5402490175, 5402499115, and 5402499175 are dedicated to polyethylene filament yarn at specific twist thresholds (below 5 turns/m and between 5–50 turns/m), while the NESOI lines (5402490140, 5402499140, 5402499180) capture all other synthetic filament yarns not covered by polyethylene, nylon, polyester, or polypropylene provisions. Correct classification requires confirming the polymer composition from the manufacturer's specification sheet.
Line 5402491100 covers colored multifilament yarn with fewer than 5 turns/m that is specifically used for wigs, excluding elastomeric constructions. The wig-use designation is a functional criterion, so importers should retain documentation — such as purchase orders or end-use certifications — confirming the intended application if CBP questions the classification.
ImportsExports
Imports
$2.5MYoY · free account
Exports
$4.2MYoY · free account
12-mo low · imports
Low · free accountOver the twelve months to August 2026, the U.S. imported $22.0M of Other Synthetic Filament Yarn, Single, Untwisted or ≤50 Turns/Meter, Not for Retail Sale (NESOI) and exported $61.4M.
Through August 2026. Source: U.S. Census Bureau.
Trade Directory
List your company under HS 540249 — Other Synthetic Filament Yarn, Single, Untwisted or ≤50 Turns/Meter, Not for Retail Sale (NESOI), so the companies trading it can find you. Be the first supplier listed.
Subheading 5 of 22 in heading 5402
Subheading 540249 · $4.2M of $49.0M
HS10 import codes under this HS6 parent, each with its own page. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Imports for consumption | Average duty rate | Dutiable Share | Duty Collected |
|---|---|---|---|---|---|
| 5402499115 | Polyethylene Syn Fil Yn Untwst/Twst Lt 5 M2 NESOI | $1.9M | 41.14% | 100.00% | $771K |
| 5402499175 | Polyethylene Syn Fil Yrn Mult Gt=5 Lt=50tm2 NESOI | $201K | 35.73% | 100.00% | $72K |
| 5402499140 | Syn Fil Yn Lt 67 Sing Yn Mono/Mult Lt 5tr/M2 NESOI | $175K | 9.65% | 80.27% | $17K |
| 5402499180 | Syn Fil Yrn Tex Lt 67 DC Mult Gt=5 Lt=50tm2 NESOI | $147K | 14.52% | 100.00% | $21K |
| 5402491100 | Syn Fil Yn, Clrd Multifl, Lt 5 Trns/M, Wig, Exc Elast | $14K | 37.50% | 100.00% | $5K |
HS10 export codes under this HS6 parent, each with its own page. Source: U.S. Schedule B export classification.
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.
Exports · August 2026
destination
South Korea and Netherlands together take 75% of it.
customs district
origin
entry
rate provision · imports
1.4% enters free of duty; duty collected equals 36.76% of imports for consumption.