Heading 8547

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

7 declarable lines

Heading 8547 covers insulating fittings for electrical machines, appliances or equipment that are wholly of insulating material apart from minor metal assembly components, plus base metal electrical conduit tubing and joints lined with insulating material. It is split by material into ceramic, plastic and other insulating fittings, with separate lines for lined base metal conduit tubing and its joints.

Products in this heading

Ceramic insulator bodies used in the production of spark plugs for natural gas-fueled stationary internal combustion engines
Other ceramic insulating fittings for electrical machines or equipment
Plastic insulating fittings such as plastic insulating bushings and sleeves
Other insulating fittings of materials other than ceramics or plastics
Base metal electrical conduit tubing lined with insulating material
Threaded joints for base metal electrical conduit tubing lined with insulating material
Other joints for base metal electrical conduit tubing lined with insulating material

How to choose the right subheading

Confirm the item is an insulating fitting for electrical machines, appliances or equipment, not a standalone electrical insulator of heading 8546.
Identify the material: ceramic fittings go to 8547.10, plastic fittings to 8547.20, and other materials to 8547.90.
For ceramic fittings, check whether the item is the ceramic insulator used in production of spark plugs for natural gas-fueled stationary internal combustion engines.
For 8547.90, separate other insulating fittings from base metal conduit tubing or joints lined with insulating material.
For lined base metal conduit joints, choose the line for threaded joints or the line for other joints.

Often confused with

Electrical insulators of any material, such as line insulators
Heading 8547 excludes insulators of heading 8546.
Heading 8546
Spark plugs
A finished spark plug is engine ignition equipment, not an insulating fitting.
Heading 8511
Insulated wire and cable
Insulated conductors are classified in heading 8544, not as insulating fittings.
Heading 8544
Dedicated plastic parts of switchgear or connectors
Parts suitable solely or principally for heading 8535, 8536 or 8537 apparatus go in heading 8538.
Heading 8538

Frequently asked questions

What is the HTS code for plastic insulating fittings?

Plastic insulating fittings are classified under 8547.20.00.00, with a general (MFN) rate of Free.

What is the duty on ceramic insulating fittings?

Other ceramic insulating fittings under 8547.10.80.00 have a general (MFN) rate of 3%. The ceramic insulator for production of spark plugs for natural gas-fueled stationary internal combustion engines under 8547.10.40.00 also has a general (MFN) rate of 3%.

How do I classify base metal electrical conduit tubing lined with insulating material?

Base metal electrical conduit tubing lined with insulating material is classified under 8547.90.00.20, with a general (MFN) rate of 4.6%. Threaded joints for that tubing go under 8547.90.00.30 at 4.6%, and other joints go under 8547.90.00.40 at 4.6%.

Guide written from the official schedule text. Rates quoted are general (MFN) rates; check the line page for trade agreement rates and the classification of your exact product.