U.S. imports of Parts for Pulp-Making Machinery (HS 843991) totaled $10.1M in August 2026, imported from 36 countries.
Importers of Parts for Pulp-Making Machinery paid $1.3M in duties in August 2026, an average duty rate of 12.65% — duty actually collected as a share of the imports that cleared customs, not the published tariff schedule.
Last updated: August 2026 dataCanada leads US imports of parts for pulp-making machinery, followed by Germany and Sweden — a supplier mix that reflects both North American mill proximity and European OEM aftermarket networks. The US tariff schedule subdivides this heading into specialized wear parts such as bed plates, roll bars, and other stock-treating components (8439911000) and all other parts not elsewhere specified (8439919000), a distinction that matters because stock-treating parts experience high wear rates and drive recurring import activity independent of new machine installations. Importers should ensure parts are matched to the correct parent machine heading, as parts for paper-making or finishing machinery are classified separately under heading 843999.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
395 import shipments a month
Stock-treating parts are components that directly contact and process the fiber slurry in pulp refining — including refiner plates, roll bars, and bed plates subject to continuous abrasive wear. The residual line (8439919000) covers all other parts of pulp-making machinery that do not fall within that specific wear-part definition. OEM part numbers and technical specifications are the primary evidence for distinguishing the two lines.
Parts for pulp-making machinery (843991) and parts for paper-making or finishing machinery (843999) are classified under different headings and tariff lines. A mixed shipment must be itemized on the entry with each part assigned to its correct heading based on the machine it is designed to serve. Combining them under a single line risks misclassification and potential CBP penalties.
Subheading 3 of 5 in heading 8439
Subheading 843991 · $10.1M of $46.9M
ImportsExports
Imports
$10.1MYoY · free account
Exports
$9.1MYoY · free account
12-mo low · imports
Low · free accountOver the twelve months to August 2026, the U.S. imported $116.0M of Parts for Pulp-Making Machinery and exported $88.7M.
Through August 2026. Source: U.S. Census Bureau.
Trade Directory
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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 |
|---|---|---|---|---|---|
| 8439919000 | Parts of Mach for Make Pulp of Fib Cell Mat, NESOI | $8.2M | 13.32% | 85.10% | $1.1M |
| 8439911000 | Bed Plate, Roll Bars & Other Stock-Treating Parts | $1.9M | 9.84% | 49.96% | $191K |
HS10 export codes under this HS6 parent, each with its own page. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 8439910000 | Parts of Mach F Make Pulp of Fibr Cellulosic Matl | $9.1M |
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.
Imports · August 2026
origin
Canada and Finland together supply 41% of it. China pays 36.8% duty; Canada 0.3%.
customs district
destination
entry
rate provision · imports
21.6% enters free of duty; duty collected equals 12.65% of imports for consumption.