Harmonized System
U.S. imports of Non-Ceramic, Non-Plastic Insulating Fittings & Insulation-Lined Electrical Conduit (HS 854790) totaled $21.6M in August 2026, imported from 39 countries.
Importers of Non-Ceramic, Non-Plastic Insulating Fittings & Insulation-Lined Electrical Conduit paid $4.1M in duties in August 2026, an average duty rate of 20.47% — duty actually collected as a share of the imports that cleared customs, not the published tariff schedule. Non-Ceramic, Non-Plastic Insulating Fittings & Insulation-Lined Electrical Conduit imports of $21.6M in August 2026 ran 14% above the year-to-date monthly average of $19.0M.
Last updated: August 2026 dataElectrical conduit tubing and joints of base metal lined with insulating material — along with insulating fittings not made of ceramic or plastic — are grouped under this residual heading, which the US schedule breaks into four distinct 10-digit lines: fittings NESOI (8547900010), plain conduit tubing (8547900020), threaded conduit joints (8547900030), and other conduit joints (8547900040). The conduit lines are widely used in commercial construction, industrial wiring, and infrastructure projects where metal conduit with an internal insulating liner is required by electrical codes. Canada and Mexico are the leading suppliers, with cross-border manufacturing integration under USMCA a significant factor in supply-chain planning.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
1.8K import shipments a month
The US schedule separates insulating fittings NESOI (8547900010) from conduit tubing (8547900020), threaded conduit joints (8547900030), and other conduit joints (8547900040). The product form — fitting versus tubing versus joint — and whether joints are threaded drive the classification. Each line may carry a different duty rate, so correct product-form identification is essential before filing entry.
The heading requires that the conduit or joint be of base metal lined with insulating material; the specific type of insulating liner (rubber, plastic, etc.) does not change the heading classification. However, if the conduit is made entirely of plastic rather than metal with a liner, it would be classified elsewhere — typically in Chapter 39 or under heading 3917.
Trade Directory
List your company under HS 854790 — Non-Ceramic, Non-Plastic Insulating Fittings & Insulation-Lined Electrical Conduit, so the companies trading it can find you. Be the first supplier listed.
Subheading 1 of 3 in heading 8547
Subheading 854790 · $21.6M of $44.2M
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 |
|---|---|---|---|---|---|
| 8547900010 | Insulating Fittings for Machines NESOI | $10.8M | 14.34% | 58.87% | $1.5M |
| 8547900020 | Electrical Conduit Tubing, Lined With Insulation | $5.4M | 25.94% | 99.24% | $1.4M |
| 8547900030 | Electrical Conduit Lined With Insulation, Jnts Thd | $3.2M | 30.75% | 92.32% | $977K |
| 8547900040 | Electrical Conduit Joints Lined W/ Insulation, Nes | $888K | 25.15% | 83.96% | $223K |
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.
Imports · August 2026
origin
Mexico and Canada together supply 51% of it. China pays 48.1% duty; Canada 4.6%.
customs district
destination
entry
rate provision · imports
22.5% enters free of duty; duty collected equals 20.47% of imports for consumption.
ImportsExports
Imports
$21.6MYoY · free account
Exports
$18.0MYoY · free account
12-mo low · imports
Low · free accountOver the twelve months to August 2026, the U.S. imported $211.0M of Non-Ceramic, Non-Plastic Insulating Fittings & Insulation-Lined Electrical Conduit and exported $189.3M.
Through August 2026. Source: U.S. Census Bureau.