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HTS heading 8547: Insulating fittings for electrical machines, appliances or equipment, being fittings wholly of insulating material apart from any minor components of metal (for

Heading 8547 of the US Harmonized Tariff Schedule covers 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. Below: every rated tariff line in it with its general duty rate, Section 301 China status and exclusions, then a page per line with a free duty calculator.

Official USITC HTS, 2026HTSRev20 · check on hts.usitc.gov

Heading 8547 at a glance

Goods named in this heading (official line texts): Ceramic insulators to be used in the production of spark plugs for natural gas-fueled, station…, Insulating fittings of plastics.

Subheadings (6-digit)

All tariff lines in heading 8547

LineDescriptionGeneralSection 301 (China)Exclusions
8547.10.40Ceramic insulators to be used in the production of spark plugs for natural gas-fueled, station…3%List 3 +25%
8547.10.80Insulating fittings of ceramics: Other3%List 3 +25%
8547.20.00Insulating fittings of plasticsFreeList 3 +25%
8547.90.00Insulating fittings for electrical machines, appliances or equipment, being fitt…: Other4.6%List 3 +25%

All of chapter 85 · Chapter 85 rate summary · HTS lookup

General information from the official US Harmonized Tariff Schedule (USITC) and USTR Section 301 notices in HTS Chapter 99; not legal or customs advice. Classification is decided by CBP; confirm with a licensed customs broker or a CBP binding ruling.