United States tariff, chapter 84: Nuclear reactors, boilers, machinery and mechanical appliances; parts thereof
Last updated
Key facts
- National lines
- 1,706
- Subheadings
- 538
- Tariff
- United States
- Chapter
- 84: Nuclear reactors, boilers, machinery and mechanical appliances; parts thereof
Summary
The United States tariff has 1,706 national lines in HS chapter 84 (nuclear reactors, boilers, machinery and mechanical appliances; parts thereof), under 538 subheadings in 86 headings.
Subheadings with United States lines
The United States tariff has 1,706 national lines in HS chapter 84 (nuclear reactors, boilers, machinery and mechanical appliances; parts thereof), under 538 subheadings in 86 headings.
Subheadings 1 to 100 of 538, page 1 of 6.
84.01 Nuclear reactors; fuel elements (cartridges), non-irradiated, for nuclear reactors; machinery and apparatus for isotopic separation; parts thereof
84.02 Steam or other vapor generating boilers (other than central heating hot water boilers capable also of producing low pressure steam); super-heated water boilers; parts thereof
- 8402.11Steam or other vapour generating boilers: Watertube boilers with a steam production exceeding 45t per hour1 line
- 8402.12Steam or other vapour generating boilers: Watertube boilers with a steam production not exceeding 45t per hour1 line
- 8402.19Steam or other vapour generating boilers: Other vapour generating boilers, including hybrid boilers1 line
- 8402.20Super-heated water boilers1 line
- 8402.90Parts2 lines
84.03 Central heating boilers (other than those of heading 8402) and parts thereof
84.04 Auxiliary plant for use with boilers of heading 8402 or 8403 (for example, economizers, super-heaters, soot removers, gas recoverers); condensers for steam or other vapor power units; parts thereof
84.05 Producer gas or water gas generators, with or without their purifiers; acetylene gas generators and similar water process gas generators, with or without their purifiers; parts thereof
84.06 Steam turbines and other vapor turbines, and parts thereof
84.07 Spark-ignition reciprocating or rotary internal combustion piston engines
- 8407.10Aircraft engines4 lines
- 8407.21Marine propulsion engines: Outboard motors2 lines
- 8407.29Marine propulsion engines: Other4 lines
- 8407.31Reciprocating piston engines of a kind used for the propulsion of vehicles of Chapter 87: Of a cylinder capacity not exceeding 50 cc2 lines
- 8407.32Reciprocating piston engines of a kind used for the propulsion of vehicles of Chapter 87: Of a cylinder capacity exceeding 50 cc but not exceeding 250 cc5 lines
- 8407.33Reciprocating piston engines of a kind used for the propulsion of vehicles of Chapter 87: Of a cylinder capacity exceeding 250 cm3 but not exceeding 1 000 cm39 lines
- 8407.34Reciprocating piston engines of a kind used for the propulsion of vehicles of Chapter 87: Of a cylinder capacity exceeding 1,000 cc12 lines
- 8407.90Other engines9 lines
84.08 Compression-ignition internal combustion piston engines (diesel or semi-diesel engines)
84.09 Parts suitable for use solely or principally with the engines of heading 8407 or 8408
84.10 Hydraulic turbines, water wheels and regulators therefor; parts thereof
- 8410.11Hydraulic turbines and water wheels: Of a power not exceeding 1,000 kW1 line
- 8410.12Hydraulic turbines and water wheels: Of a power exceeding 1,000 kW but not exceeding 10,000 kW1 line
- 8410.13Hydraulic turbines and water wheels: Of a power exceeding 10,000 kW1 line
- 8410.90Parts, including regulators1 line
84.11 Turbojets, turbopropellers and other gas turbines, and parts thereof
- 8411.11Turbojets: Of a thrust not exceeding 25 kN2 lines
- 8411.12Turbojets: Of a thrust exceeding 25 kN2 lines
- 8411.21Turbopropellers: Of a power not exceeding 1,100 kW2 lines
- 8411.22Turbopropellers: Of a power exceeding 1,100 kW2 lines
- 8411.81Other gas turbines: Of a power not exceeding 5,000 kW3 lines
- 8411.82Other gas turbines: Of a power exceeding 5,000 kW3 lines
- 8411.91Parts: Of turbo-jets or turbo-propellers6 lines
- 8411.99Parts: Other7 lines
84.12 Other engines and motors, and parts thereof
- 8412.10Reaction engines other than turbo-jets2 lines
- 8412.21Hydraulic power engines and motors: Linear acting (cylinders)5 lines
- 8412.29Hydraulic power engines and motors: Other6 lines
- 8412.31Pneumatic power engines and motors: Linear acting (cylinders)2 lines
- 8412.39Pneumatic power engines and motors: Other2 lines
- 8412.80Other2 lines
- 8412.90Parts9 lines
84.13 Pumps for liquids, whether or not fitted with a measuring device; liquid elevators; part thereof
- 8413.11Pumps fitted or designed to be fitted with a measuring device: Pumps for dispensing fuel or lubricants, of the type used in filling-stations or in garages1 line
- 8413.19Pumps fitted or designed to be fitted with a measuring device: Other1 line
- 8413.20Hand pumps, other than those of subheading 8413.11 or 8413.191 line
- 8413.30Fuel, lubricating or cooling medium pumps for internal combustion piston engines4 lines
- 8413.40Concrete pumps1 line
- 8413.50Other reciprocating positive displacement pumps5 lines
- 8413.60Other rotary positive displacement pumps6 lines
- 8413.70Other centrifugal pumps9 lines
- 8413.81Other pumps; liquid elevators: Pumps3 lines
- 8413.82Other pumps; liquid elevators: Liquid elevators1 line
- 8413.91Parts: Of pumps12 lines
- 8413.92Parts: Of liquid elevators1 line
84.14 Air or vacuum pumps, air or other gas compressors and fans; ventilating or recycling hoods incorporating a fan, whether or not fitted with filters; gas-tight biological safety cabinets, whether or not fitted with filters; parts thereof
- 8414.10Vacuum pumps1 line
- 8414.20Hand- or foot-operated air pumps1 line
- 8414.30Compressors of a kind used in refrigerating equipment9 lines
- 8414.40Air compressors mounted on a wheeled chassis for towing1 line
- 8414.51Fans: Table, floor, wall, window, ceiling or roof fans, with a self- contained electric motor of an output not exceeding 125 W3 lines
- 8414.59Fans: Other7 lines
- 8414.60Hoods having a maximum horizontal side not exceeding 120cm1 line
- 8414.70Gas-tight biological safety cabinets1 line
- 8414.80Other21 lines
- 8414.90Parts12 lines
84.15 Air conditioning machines, comprising a motor-driven fan and elements for changing the temperature and humidity, including those machines in which the humidity cannot be separately regulated; parts thereof
- 8415.10Of a kind designed to be fixed to a window, wall, ceiling or floor, self-contained or “split-system”5 lines
- 8415.20Of a kind used for persons, in motor vehicles1 line
- 8415.81Other: Incorporating a refrigerating unit and a valve for reversal of the cooling/heat cycle (reversible heat pumps)3 lines
- 8415.82Other: Other, incorporating a refrigerating unit10 lines
- 8415.83Other: Not incorporating a refrigerating unit4 lines
- 8415.90Parts7 lines
84.16 Furnace burners for liquid fuel, for pulverized solid fuel or for gas; mechanical stokers, including their mechanical grates, mechanical ash dischargers and similar appliances; parts thereof
84.17 Industrial or laboratory furnaces and ovens, including incinerators, nonelectric, and parts thereof
84.18 Refrigerators, freezers and other refrigerating or freezing equipment, electric or other; heat pumps, other than the air conditioning machines of heading 8415; parts thereof
- 8418.10Combined refrigerator-freezers, fitted with separate external doors or drawers, or combinations thereof9 lines
- 8418.21Refrigerators, household type: Compression-type4 lines
- 8418.29Refrigerators, household type: Other2 lines
- 8418.30Freezers of the chest type, not exceeding 800l capacity1 line
- 8418.40Freezers of the upright type, not exceeding 900l capacity1 line
- 8418.50Other furniture (chests, cabinets, display counters, show-cases and the like) for storage and display, incorporating refrigerating or freezing equipment2 lines
- 8418.61Other refrigerating or freezing equipment; heat pumps: Heat pumps other than air conditioning machines of heading 84.151 line
- 8418.69Other refrigerating or freezing equipment; heat pumps: Other7 lines
- 8418.91Parts: Furniture designed to receive refrigerating or freezing equipment1 line
- 8418.99Parts: Other8 lines
84.19 Machinery, plant or laboratory equipment, whether or not electrically heated (excluding furnaces, ovens and other equipment of heading 8514), for the treatment of materials by a process involving a change of temperature such as heating, cooking, roasting, distilling, rectifying, sterilizing, pasteurizing, steaming, drying, evaporating, vaporizing, condensing or cooling, other than machinery or plant of a kind used for domestic purposes; instantaneous or storage water heaters, nonelectric; parts…
- 8419.11Instantaneous or storage water heaters, non-electric: Instantaneous gas water heaters1 line
In other countries
No other national tariff on border.bot has live lines under chapter 84 yet.
Frequently asked questions
How many national tariff lines does the United States tariff have in HS chapter 84?
The United States tariff has 1,706 national lines in HS chapter 84 (nuclear reactors, boilers, machinery and mechanical appliances; parts thereof), under 538 subheadings in 86 headings.
Sources and updates
The tariff lines for the United States come from border.bot release 1 (edition 2026HTSRev21), read from the publisher’s files, and have been live since 9 October 2026.
The duty rates for the United States come from border.bot release 1 (edition 2026HTSRev21), read from the publisher’s files, and have been live since 9 October 2026.
The trade programmes for the United States come from border.bot release 1 (edition 2026HTSRev21), read from the publisher’s files, and have been live since 9 October 2026.
This page was last updated on 9 October 2026.
Guidance from published tariff data, not a binding ruling. For a decision customs must follow, apply to the destination’s customs authority for a binding tariff ruling.
Official source files: