U.S. exports of Synthetic Monofilament, NESOI (67 Decitex or More, Cross-Section Not Exceeding 1 mm) (HS 540419) totaled $11.5M in August 2026.
Importers of Synthetic Monofilament, NESOI (67 Decitex or More, Cross-Section Not Exceeding 1 mm) paid $661K in duties in August 2026, an average duty rate of 12.54% — duty actually collected as a share of the imports that cleared customs, not the published tariff schedule.
Last updated: August 2026 dataNylon, polyester, and other non-elastomeric, non-polypropylene synthetic monofilaments meeting the 67-decitex and 1 mm cross-section thresholds land here as the residual 'NESOI' category within heading 5404. The US schedule carves out a dedicated line for racket strings (5404191000) — a commercially distinct end-use — alongside separate lines for nylon/polyamide (5404198020), polyester (5404198040), and all other synthetic types (5404198080). Japan is the leading supplier, followed by Mexico and Germany, reflecting both precision manufacturing capability and proximity-driven supply chains. Correct polymer identification is critical because misidentifying nylon as polyester, or vice versa, shifts the applicable tariff line.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
246 import shipments a month
Racket strings (5404191000) are distinguished because they have a specific end-use and cross-sectional dimension range (1–5 mm) that sets them apart from general-purpose monofilament. This dedicated line allows CBP to apply a distinct duty rate and facilitates trade statistics for the sporting goods sector. Importers must confirm the product is actually intended and suitable for use as racket strings to claim this classification.
CBP expects a manufacturer's specification sheet or laboratory analysis confirming the polymer type (e.g., nylon 6, nylon 6,6, polyethylene terephthalate). For blended compositions, the predominant polymer by weight governs classification. A licensed customs broker can advise on whether a binding ruling from CBP is warranted for novel or ambiguous polymer blends.
Subheading 1 of 4 in heading 5404
Subheading 540419 · $11.5M of $15.0M
ImportsExports
Imports
$5.2MYoY · free account
Exports
$11.5MYoY · free account
12-mo low · imports
Low · free accountOver the twelve months to August 2026, the U.S. imported $59.0M of Synthetic Monofilament, NESOI (67 Decitex or More, Cross-Section Not Exceeding 1 mm) and exported $181.0M.
Through August 2026. Source: U.S. Census Bureau.
Trade Directory
List your company under HS 540419 — Synthetic Monofilament, NESOI (67 Decitex or More, Cross-Section Not Exceeding 1 mm), so the companies trading it can find you. Be the first supplier listed.
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 |
|---|---|---|---|---|---|
| 5404198080 | Syn Mnfil, >=67 Dec, No Cross-Sec Dim 1-5mm, NESOI | $2.8M | 13.65% | 99.06% | $385K |
| 5404198020 | Syn Mnfil >=67 Decitex, Nylon/Oth Polyamide, <=1mm | $1.4M | 4.71% | 28.14% | $65K |
| 5404198040 | Syn Mnfil Poly, >=67 Dec, No Cross-Sec Dim, 1-5mm | $896K | 20.94% | 79.40% | $187K |
| 5404191000 | Syn Monofil Racket Strings, X-Dimen (1-5) Mm | $173K | 13.29% | 100.00% | $23K |
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
Mexico and Canada together take 65% of it.
customs district
entry
rate provision · imports
22.9% enters free of duty; duty collected equals 12.54% of imports for consumption.