8547.90.00.40—Insulating fittings for electrical machines, appliances or equipment, being fittings wholly of insulating material apart from any minor components of metal (for example, threaded sockets) incorporated during molding solely for the purposes of assembly, other than insulators of heading 8546; electrical conduit tubing and joints therefor, of base metal lined with insulating material, other
General
4.6%
Units
kg
Column 2
45%
Special
Free (A,AU,B,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG)
Plain-English explanation
HTS 8547.90.00.40 is the U.S. Harmonized Tariff Schedule classification for Insulating fittings for electrical machines, appliances or equipment, being fittings wholly of insulating material apart from any minor components of metal (for example, threaded sockets) incorporated during molding solely for the purposes of assembly, other than insulators of heading 8546; electrical conduit tubing and joints therefor, of base metal lined with insulating material, other. It's a 10-digit statistical line in Chapter 85: Electrical machinery and equipment and parts thereof; sound recorders and reproducers; television image and sound recorders and reproducers, and parts and accessories of such articles, Section XVI: Machinery and Mechanical Appliances; Electrical Equipment; Parts Thereof; Sound Recorders and Reproducers, Television Image and Sound Recorders and Reproducers, and Parts and Accessories of Such Articles, used by U.S. Customs and Border Protection to determine the duty rate at entry. 12 Chapter 99 tariff modifications currently stack on top of the base rate, and 18 active AD/CVD orders flag this code.
New to HTS codes? Read our guide on how HTS classification works →
Tariff modifications(12)
Chapter 99 overlays that stack on the base rate
| Code | Authority | Rate |
|---|---|---|
| 9903.80.03 | section_232 | The duty provided in the applicable subheading + 25% |
| 9903.81.84 | section_232 | The duty provided in the applicable subheading + 25% |
| 9903.81.86 | section_232 | The duty provided in the applicable subheading + 25% |
| 9903.81.91 | section_232 | The duty provided in the applicable subheading + a duty of 50% upon the value of the steel content. |
| 9903.81.92 | section_232 | The duty provided in the applicable subheading. |
| 9903.81.98 | section_232 | The duty provided in the applicable subheading + 25% |
| 9903.85.01 | section_232 | The duty provided in the applicable subheading + 10% |
| 9903.85.08 | section_232 | The duty provided in the applicable subheading + a duty of 50% upon the value of the aluminum content. |
| 9903.85.09 | section_232 | The duty provided in the applicable subheading. |
| 9903.85.15 | section_232 | The duty provided in the applicable subheading + a duty of 25% upon the value of the aluminum content |
| 9903.85.68 | section_232 | The duty provided in the applicable subheading + 200% |
| 9903.85.70 | section_232 | The duty provided in the applicable subheading + 200% |
Potentially applicable AD/CVD orders(18)
Active orders that may apply to imports under this HTS code. HTS coverage is advisory — actual scope depends on each order's product description. Run the AD/CVD lookup → to check whether your specific shipment is in scope.
Aluminum Extrusions
Aluminum Extrusions
Aluminum Extrusions
Aluminum Extrusions
Aluminum Extrusions
Aluminum Extrusions
Aluminum Extrusions
Aluminum Extrusions
Aluminum Extrusions from China (2024 Investigation)
Aluminum Extrusions
Aluminum Extrusions
Aluminum Extrusions
Aluminum Extrusions
Aluminum Extrusions
Aluminum Extrusions
Aluminum Extrusions
Aluminum Extrusions
Aluminum Extrusions
Frequently asked questions
What is HTS code 8547.90.00.40?
HTS 8547.90.00.40 is the U.S. Harmonized Tariff Schedule classification for Insulating fittings for electrical machines, appliances or equipment, being fittings wholly of insulating material apart from any minor components of metal (for example, threaded sockets) incorporated during molding solely for the purposes of assembly, other than insulators of heading 8546; electrical conduit tubing and joints therefor, of base metal lined with insulating material, other. It belongs to Chapter 85 of the HTSUS.
What is the general duty rate for HTS 8547.90.00.40?
The general (Column 1) duty rate for HTS 8547.90.00.40 is 4.6%. This is the most-favored-nation (MFN) rate that applies to imports from World Trade Organization member countries.
Are there preferential or trade-program rates for HTS 8547.90.00.40?
Yes. Imports of HTS 8547.90.00.40 from countries party to a trade program (such as USMCA, KORUS, GSP, or the African Growth and Opportunity Act) may qualify for the special rate: Free (A,AU,B,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG). Eligibility depends on rules of origin and certification.
What is the Column 2 (statutory) rate for HTS 8547.90.00.40?
The Column 2 rate for HTS 8547.90.00.40 is 45%. This rate applies to imports from countries that do not have normal trade relations with the United States (currently Cuba and North Korea).
Are there Section 301 or Section 232 tariffs on HTS 8547.90.00.40?
Yes — HTS 8547.90.00.40 is covered by section_232 provision 9903.80.03 (The duty provided in the applicable subheading + 25%). 11 additional overlays also touch this code. Open the code page for the full overlay stack with effective dates and country scopes.
Does HTS 8547.90.00.40 have any antidumping or countervailing duty (AD/CVD) orders?
Yes — 18 AD/CVD orders flag this code: A-549-847 (AD, Thailand), A-475-846 (AD, Italy), A-301-806 (AD, Colombia) plus 15 more. Open the code page for deposit rates, scope determinations, and the linked case lookups.
Trade programs(16)
Free Trade Agreement and special-program eligibility
Learn more
Tandom guides relevant to this code
Section 232 steel, aluminum, and copper duties in 2026
What changed April 6, 2026, what stayed the same, and how to file a steel, aluminum, or copper line in ACE without leaving duty exposure on the table.
Open resource
How Chapter 99 tariff layers stack on a single entry
How to read, order, and report Chapter 99 HTS codes alongside the base classification on a US entry summary in 2026. The full stacking ladder for brokers and compliance teams.
Open resource
How to calculate US import duties
A working guide to the inputs, the layers, and the math behind a US entry summary in 2026. Written for brokers, forwarders, and importer compliance teams.
Open resource
Trade compliance APIs in broker workflows
Where trade compliance APIs fit in a broker's filing pipeline: HTS classification, duty calculation, AD/CVD scope match, and post-summary corrections.
Open resource
Wire the Tandom Duty Calculator API into a TMS or broker software
Drop the Tandom Duty Calculator API into a TMS, broker software, or in-house ERP. Code samples, the response shape, and ACE reporting order, in 2026.
Open resource
Section 301 China tariff exclusions in 2026
What the 178 active Section 301 exclusions cover, how to claim 9903.88.69 on an entry, and what changes when the November 10, 2026 deadline passes.
Open resource