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HS Chapter 84 — Nuclear reactors, boilers, machinery and mechanical appliances

HS chapter 84 (Nuclear reactors, boilers, machinery and mechanical appliances) covers 496 product categories in U.S. import records, with 9,686,275 bill-of-lading shipments. The most imported headings are 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, Other lifting, handling, loading or unloading machinery (for example, elevators, escalators, conveyors, teleferics), and Machines and mechanical appliances having individual functions.

Sourced from U.S. Customs bill of lading data · Updated monthly · Data through August 2026 · Chapter → heading → product, drill in for importers and suppliersCite as: ImportDoor, U.S. Customs bill of lading data (data through August 2026), https://www.importdoor.com/products/chapter/84

Headings in this chapter

HSHeadingProductsShipments
8415Air 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 regulated6636,162
8428Other lifting, handling, loading or unloading machinery (for example, elevators, escalators, conveyors, teleferics)10565,617
8479Machines and mechanical appliances having individual functions10549,736
8418Refrigerators, freezers and other refrigerating or freezing equipment, electric or other10465,573
8423Weighing machinery (excluding balances of a sensitivity of 5 cg or better), including weight-operated counting or checking machines7427,096
8414Air or vacuum pumps, air or other gas compressors and fans9390,341
8483Transmission shafts (including camshafts and crankshafts) and cranks7356,692
8481Taps, cocks, valves and similar appliances, for pipes, boiler shells, tanks, vats or the like, including pressure-reducing valves and thermostatically controlled valves6354,095
8426Ships' derricks9349,584
8474Machinery for sorting, screening, separating, washing, crushing, grinding, mixing or kneading earth, stone, ores or other mineral substances, in solid (including powder or paste) form7344,778
8482Ball or roller bearings, and parts thereof8289,927
8419Machinery, 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 purposes11270,696
8413Pumps for liquids, whether or not fitted with a measuring device12254,506
8471Automatic data processing machines and units thereof8211,385
8421Centrifuges, including centrifugal dryers12197,543
8466Parts and accessories suitable for use solely or principally with the machines of headings 8456 to 8465, including work or tool holders, self-opening dieheads, dividing heads and other special attachments for the machines7195,544
8431Parts suitable for use solely or principally with the machinery of headings 8425 to 84308183,326
8448Auxiliary machinery for use with machines of heading 8444, 8445, 8446 or 8447 (for example, dobbies, Jacquards, automatic stop motions and shuttle changing mechanisms)11176,650
8422Dishwashing machines6152,765
8409Parts suitable for use solely or principally with the engines of heading 8407 or 84083152,239
8429Self-propelled bulldozers, angledozers, graders, levelers, scrapers, mechanical shovels, excavators, shovel loaders, tamping machines and road rollers7146,774
8412Other engines and motors, and parts thereof7141,680
8451Machinery (other than machines of heading 8450) for washing, cleaning, wringing, drying, ironing, pressing (including fusing presses), bleaching, dyeing, dressing, finishing, coating or impregnating textile yarns, fabrics or made up textile articles and machines for applying the paste to the base fabric or other support used in the manufacture of floor coverings such as linoleum8135,647
8453Machinery for preparing, tanning or working hides, skins or leather or for making or repairing footwear or other articles of hides, skins or leather, other than sewing machines3128,176
8467Tools for working in the hand, pneumatic, hydraulic or with self-contained electric or nonelectric motor, and parts thereof10127,846
8452Sewing machines, other than book-sewing machines of heading 84405113,072
8438Machinery, not specified or included elsewhere in this chapter, for the industrial preparation or manufacture of food or drink, other than machinery for the extraction or preparation of animal or fixed vegetable or microbial fats or oils8111,546
8477Machinery for working rubber or plastics or for the manufacture of products from these materials8103,966
8441Other machinery for making up paper pulp, paper or paperboard, including cutting machines of all kinds, and parts thereof6100,995
8433Harvesting or threshing machinery, including straw or fodder balers1193,102
8465Machine tools (including machines for nailing, stapling, glueing or otherwise assembling) for working wood, cork, bone, hard rubber, hard plastics or similar hard materials991,265
8402Steam or other vapor generating boilers (other than central heating hot water boilers capable also of producing low pressure steam)490,082
8424Mechanical appliances (whether or not hand operated) for projecting, dispersing or spraying liquids or powders886,387
8480Molding boxes for metal foundry986,270
8454Converters, ladles, ingot molds and casting machines, of a kind used in metallurgy or in metal foundries, and parts thereof483,404
8435Presses, crushers and similar machinery, used in the manufacture of wine, cider, fruit juices or similar beverages281,594
8443Printing machinery used for printing by means of plates, cylinders and other printing components of heading 84421073,322
8427Fork-lift trucks369,463
8459Machine tools (including way-type unit head machines) for drilling, boring, milling, threading or tapping by removing metal, other than lathes (including turning centers) of heading 8458964,140
8473Parts and accessories (other than covers, carrying cases and the like) suitable for use solely or principally with machines of headings 8470 to 8472557,930
8425Pulley tackle and hoists other than skip hoists757,923
8457Machining centers, unit construction machines (single station) and multistation transfer machines, for working metal355,809
8455Metal-rolling mills and rolls therefor555,588
8432Agricultural, horticultural or forestry machinery for soil preparation or cultivation955,164
8436Other agricultural, horticultural, forestry, poultry-keeping or bee-keeping machinery, including germination plant fitted with mechanical or thermal equipment655,130
8411Turbojets, turbopropellers and other gas turbines, and parts thereof654,855
8439Machinery for making pulp of fibrous cellulosic material or for making or finishing paper or paperboard (other than the machinery of heading 8419)554,288
8440Bookbinding machinery, including book-sewing machines, and parts thereof247,748
8472Other office machines (for example, hectograph or stencil duplicating machines, addressing machines, automatic banknote dispensers, coin-sorting machines, coin-counting or wrapping machines, pencil-sharpening machines, perforating or stapling machines)243,258
8410Hydraulic turbines, water wheels and regulators therefor242,018
8434Milking machines and dairy machinery, and parts thereof341,250
8475Machines for assembling electric or electronic lamps, tubes or flashbulbs, in glass envelopes440,755
8450Household- or laundry-type washing machines, including machines which both wash and dry539,613
8462Machine tools (including presses) for working metal by forging, hammering or die forging (excluding rolling mills)1234,536
8458Lathes (including turning centers) for removing metal433,360
8407Spark-ignition reciprocating or rotary internal combustion piston engines829,782
8470Calculating machines and pocket-size data recording, reproducing and displaying machines with calculating functions529,268
8430Other moving, grading, leveling, scraping, excavating, tamping, compacting, extracting or boring machinery, for earth, minerals or ores928,315
8447Knitting machines, stitch-bonding machines and machines for making gimped yarn, tulle, lace, embroidery, trimmings, braid or net and machines for tufting327,497
8406Steam turbines and other vapor turbines, and parts thereof425,721
8416Furnace burners for liquid fuel, for pulverized solid fuel or for gas424,693
8484Gaskets and similar joints of metal sheeting combined with other material or of two or more layers of metal323,491
8408Compression-ignition internal combustion piston engines (diesel or semi-diesel engines)321,275
8461Machine tools for planing, shaping, slotting, broaching, gear cutting, gear grinding or gear finishing, sawing, cutting-off and other machine tools working by removing metal or cermets419,026
8463Other machine tools for working metal or cermets, without removing material418,229
8476Automatic goods-vending machines (for example, postage stamp, cigarette, food or beverage machines), including money-changing machines417,738
8449HS 8449117,043
8468Machinery and apparatus for soldering, brazing or welding, whether or not capable of cutting, other than those of heading 8515416,905
8445Machines for preparing textile fibers716,701
8487Machinery parts, not containing electrical connectors, insulators, coils, contacts or other electrical features, and215,181
8464Machine tools for working stone, ceramics, concrete, asbestos-cement or like mineral materials or for cold working glass314,415
8442Machinery, apparatus and equipment (other than the machines of headings 8456 to 8465), for preparing or making plates, cylinders or other printing components313,533
8404Auxiliary plant for use with boilers of heading 8402 or 8403 (for example, economizers, super-heaters, soot removers, gas recoverers)312,533
8456Machine tools for working any material by removal of material, by laser or other light or photon beam, ultrasonic, electro-discharge, electro-chemical, electron-beam, ionic-beam or plasma arc processes512,202
8460Machine tools for deburring, sharpening, grinding, honing, lapping, polishing or otherwise finishing metal or cermets by means of grinding stones, abrasives or polishing products, other than gear cutting, gear grinding or gear finishing machines of heading 8461912,154
8417Industrial or laboratory furnaces and ovens, including incinerators, nonelectric, and parts thereof412,040
8437Machines for cleaning, sorting or grading seed, grain or dried leguminous vegetables, and parts thereof310,989
8485Machines for additive manufacturing38,890
8403Central heating boilers (other than those of heading 8402) and parts thereof28,799
8444HS 844415,933
8405Producer gas or water gas generators, with or without their purifiers25,422
8486Machines and apparatus of a kind used solely or principally for the manufacture of semiconductor boules or wafers, semiconductor devices, electronic integrated circuits or flat panel displays44,326
8420Calendering or other rolling machines, other than for metals or glass, and cylinders therefor34,109
8478Machinery for preparing or making up tobacco23,103
8401Nuclear reactors32,638
8446Weaving machines (looms)32,113

Frequently asked questions about HS chapter 84

What is HS chapter 84?

Chapter 84 of the Harmonized System covers nuclear reactors, boilers, machinery and mechanical appliances. In U.S. import records it spans 86 four-digit headings and 496 six-digit product codes.

How many U.S. import shipments fall under HS chapter 84?

ImportDoor has 9,686,275 U.S. Customs bill-of-lading shipment records under chapter 84, updated monthly.

Which HS 84 heading is imported most into the U.S.?

HS 8415 (Air conditioning machines) leads with 636,162 shipments, followed by HS 8428 (Other lifting, handling, loading or unloading machinery) and HS 8479 (Machines and mechanical appliances having individual functions).

HS Chapter 84: Nuclear reactors, boilers | US Import Data