Nuclear Reactors, Boilers, Machinery · 1 pending regulation · 15 court cases · $187.9M monthly imports · 100% from 1 countries · Updated daily from USITC
General
Free
Special
Free
Column 2
Free
Trade Agreement Eligibility
Monthly Imports
$187.9M
2026-01
Trade Concentration
100%
from top 3 of 1 origins
Regulatory Pressure
HIGH
7 rulings — · 1 reg · 15 CIT, 0 CAFC
Global Rates
🇺🇸 Free
🇬🇧 United Kingdom: N/A · 🇪🇺 European Union: N/A · 🇨🇦 Canada: Free · 🇧🇷 Brazil: 1 NCM code
Compare All →
Data compiled from USITC HTS, US Census Bureau, CBP CROSS Rulings, Federal Register, CourtListener, HMRC / DG TAXUD / CBSA / SISCOMEX · As of 2026-04-28 · Updates monthly
This code has elevated regulatory activity — 7 CBP rulings (0 in last 2 years, trend: stable), 1 pending Federal Register actions, and 15 CIT/CAFC cases.
100% of US imports for this code come from just 1 countries. High origin concentration increases exposure to trade disruptions or tariff escalations.
This is a high-volume import code — $188M in monthly US imports. Duty rate changes or trade remedy actions on this code have significant economic impact.
List 1 — ~$34B of Chinese goods (machinery, electronics, industrial components)
Active — 7.5%–25% additional duties on Chinese-origin goods across four tranches (Lists 1–4A), with higher 2024/2025 increases on targeted product categories.
Effective 2018-07-06
These additional tariffs apply on top of the general duty rate. View full trade remedy tracker →
| Code | Description | Rate |
|---|---|---|
| 8483.90 | Toothed wheels, chain sprockets and other transmission elements presented separately; parts: | — |
| 8483.90.10 | Chain sprockets and parts thereof | 2.8% |
| 8483.90.10.10 | Forged | — |
| 8483.90.10.50 | Other | — |
| 8483.90.20.00 | Parts of flange, take-up, cartridge and hanger units | 4.5% |
| 8483.90.30.00 | Other | 4.5% |
| 8483.90.50 | Parts of gearing, gear boxes and other speed changers | 2.5% |
| 8483.90.50.10 | Forged gear blanks | — |
| 8483.90.50.20 | Parts of gear boxes and speed changers for wind turbines | — |
| 8483.90.50.80 | Other | — |
| 8483.90.70.00 | Parts of articles of subheading 8483.20 | 5.5% |
| 8483.90.80 | Other | 2.8% |
| 8483.90.80.10 | Parts of articles of subheading 8483.60.80 | — |
| 8483.90.80.40 | Parts of universal joints | — |
| 8483.90.80.80 | Other | — |
The tariff classification of a cylindrical roller bearing and cage assembly from France
The tariff classification and country of origin of a sub-assembly used in a speed reducer, and USMCA
Protest 2904-95-100074; Cam gears; Hay baler, parts; Agricultural machinery
Protest 1101-97-100038; Sprockets and Rods for ConveyorChain; Subheading 8431.39.00; Section XVI, Note 2(a); ExplanatoryNotes 39.16, 84.31 and 84.83; Rods of Other Plastics; ChainSprockets.
Tariff classification of plastic ball races for use in suspension systems of motor vehicles; Protest Number 0401-08-100024
Application for Further Review Protest No. 1101-14-100373; Tariff classification of a Bearing Cup
The tariff classification and status under the North American Free Trade Agreement (NAFTA), of plastic injection molding machine castings; Article 509
Interim regulations; solicitation of comments.·Effective 1994-01-01
CHAIN SPROCKETS AND PARTS THEREOF
Census Bureau export classification matching this HTS import code.
