Nuclear reactors, boilers, machinery and mechanical appliances; parts thereof

The 86 headings of chapter 84

• 8401: Nuclear reactors; fuel elements (cartridges), non-irradiated, for nuclear reactors; machinery and apparatus for isotopic separation; parts thereof (4 codes, General duty 2.6% to 3.3%)
• 8402: 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 (6 codes, General duty 3.3% to 5.2%)
• 8403: Central heating boilers (other than those of heading 8402) and parts thereof (2 codes, General duty Free)
• 8404: 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 (4 codes, General duty 3.5% to 5%)
• 8405: 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 (2 codes, General duty Free)
• 8406: Steam turbines and other vapor turbines, and parts thereof (19 codes, General duty Free to 6.7%)
• 8407: Spark-ignition reciprocating or rotary internal combustion piston engines (47 codes, General duty Free to 2.5%)
• 8408: Compression-ignition internal combustion piston engines (diesel or semi-diesel engines) (17 codes, General duty Free to 2.5%)
• 8409: Parts suitable for use solely or principally with the engines of heading 8407 or 8408 (22 codes, General duty Free to 2.5%)
• 8410: Hydraulic turbines, water wheels and regulators therefor; parts thereof (4 codes, General duty 3.8%)
• 8411: Turbojets, turbopropellers and other gas turbines, and parts thereof (27 codes, General duty Free to 2.5%)
• 8412: Other engines and motors, and parts thereof (28 codes, General duty Free)
• 8413: Pumps for liquids, whether or not fitted with a measuring device; liquid elevators; part thereof (45 codes, General duty Free to 2.5%)
• 8414: 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 (57 codes, General duty Free to 4.7%)
• 8415: 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 (30 codes, General duty Free to 2.2%)
• 8416: 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 (5 codes, General duty Free)
• 8417: Industrial or laboratory furnaces and ovens, including incinerators, nonelectric, and parts thereof (4 codes, General duty 2.9% to 3.9%)
• 8418: Refrigerators, freezers and other refrigerating or freezing equipment, electric or other; heat pumps, other than the air conditioning machines of heading 8415; parts thereof (36 codes, General duty Free to 1.9%)
• 8419: 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 thereof (39 codes, General duty Free to 4.2%)
• 8420: Calendering or other rolling machines, other than for metals or glass, and cylinders therefor; parts thereof (10 codes, General duty Free to 3.5%)
• 8421: Centrifuges, including centrifugal dryers; filtering or purifying machinery and apparatus, for liquids or gases; parts thereof (24 codes, General duty Free to 2.5%)
• 8422: Dishwashing machines; machinery for cleaning or drying bottles or other containers; machinery for filling, closing, sealing or labeling bottles, cans, boxes, bags or other containers; machinery for capsuling bottles, jars, tubes and similar containers; other packing or wrapping machinery (including heat-shrink wrapping machinery); machinery for aerating beverages; parts thereof (33 codes, General duty Free to 2.4%)
• 8423: Weighing machinery (excluding balances of a sensitivity of 5 cg or better), including weight-operated counting or checking machines; weighing machine weights of all kinds; parts of weighing machinery (17 codes, General duty Free to 2.9%)
• 8424: Mechanical appliances (whether or not hand operated) for projecting, dispersing or spraying liquids or powders; fire extinguishers, whether or not charged; spray guns and similar appliances; steam or sand blasting machines and similar jet projecting machines; parts thereof (20 codes, General duty Free to 2.9%)
• 8425: Pulley tackle and hoists other than skip hoists; winches and capstans; jacks (7 codes, General duty Free)
• 8426: Ships' derricks; cranes, including cable cranes; mobile lifting frames, straddle carriers and works trucks fitted with a crane (12 codes, General duty Free)
• 8427: Fork-lift trucks; other works trucks fitted with lifting or handling equipment (13 codes, General duty Free)
• 8428: Other lifting, handling, loading or unloading machinery (for example, elevators, escalators, conveyors, teleferics) (12 codes, General duty Free)
• 8429: Self-propelled bulldozers, angledozers, graders, levelers, scrapers, mechanical shovels, excavators, shovel loaders, tamping machines and road rollers (42 codes, General duty Free)
• 8430: Other moving, grading, leveling, scraping, excavating, tamping, compacting, extracting or boring machinery, for earth, minerals or ores; pile-drivers and pile-extractors; snowplows and snowblowers (19 codes, General duty Free)
• 8431: Parts suitable for use solely or principally with the machinery of headings 8425 to 8430 (44 codes, General duty Free)
• 8432: Agricultural, horticultural or forestry machinery for soil preparation or cultivation; lawn or sports ground rollers; parts thereof (22 codes, General duty Free)
• 8433: Harvesting or threshing machinery, including straw or fodder balers; grass or hay mowers; machines for cleaning, sorting or grading eggs, fruit or other agricultural produce, other than machinery of heading 8437; parts thereof (31 codes, General duty Free)
• 8434: Milking machines and dairy machinery, and parts thereof (3 codes, General duty Free)
• 8435: Presses, crushers and similar machinery, used in the manufacture of wine, cider, fruit juices or similar beverages; parts thereof (2 codes, General duty Free)
• 8436: Other agricultural, horticultural, forestry, poultry-keeping or bee-keeping machinery, including germination plant fitted with mechanical or thermal equipment; poultry incubators and brooders; parts thereof (16 codes, General duty Free)
• 8437: Machines for cleaning, sorting or grading seed, grain or dried leguminous vegetables, and parts thereof; machinery used in the milling industry or for the working of cereals or dried leguminous vegetables, other than farm type machinery; parts thereof (5 codes, General duty Free)
• 8438: Machinery, 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 oils; parts thereof (14 codes, General duty Free to 2.8%)
• 8439: Machinery for making pulp of fibrous cellulosic material or for making or finishing paper or paperboard (other than the machinery of heading 8419); parts thereof (9 codes, General duty Free)
• 8440: Bookbinding machinery, including book-sewing machines, and parts thereof (2 codes, General duty Free)
• 8441: Other machinery for making up paper pulp, paper or paperboard, including cutting machines of all kinds, and parts thereof (6 codes, General duty Free)
• 8442: Machinery, apparatus and equipment (other than the machines of headings 8456 to 8465), for preparing or making plates, cylinders or other printing components; plates, cylinders and other printing components; plates, cylinders and lithographic stones, prepared for printing purposes (for example, planed, grained or polished); parts thereof (5 codes, General duty Free)
• 8443: Printing machinery used for printing by means of plates, cylinders and other printing components of heading 8442; other printers, copying machines and facsimile machines, whether or not combined; parts and accessories thereof (43 codes, General duty Free to 3.3%)
• 8444: Machines for extruding, drawing, texturing or cutting man-made textile materials (2 codes, General duty Free)
• 8445: Machines for preparing textile fibers; spinning, doubling or twisting machines and other machinery for producing textile yarns; textile reeling or winding (including weft winding) machines and machines for preparing textile yarns for use on the machines of heading 8446 or 8447 (10 codes, General duty Free to 3.7%)
• 8446: Weaving machines (looms) (11 codes, General duty Free to 3.7%)
• 8447: Knitting machines, stitch-bonding machines and machines for making gimped yarn, tulle, lace, embroidery, trimmings, braid or net and machines for tufting (15 codes, General duty Free to 2.6%)
• 8448: Auxiliary machinery for use with machines of heading 8444, 8445, 8446 or 8447 (for example, dobbies, Jacquards, automatic stop motions and shuttle changing mechanisms); parts and accessories suitable for use solely or principally with the machines of this heading or of heading 8444, 8445, 8446 or 8447 (for example, spindles and spindle flyers, card clothing, combs, extruding nipples, shuttles, healds and heald-frames, hosiery needles) (21 codes, General duty Free to 3.7%)
• 8449: Machinery for the manufacture or finishing of felt or nonwovens in the piece or in shapes, including machinery for making felt hats; blocks for making hats; parts thereof (2 codes, General duty Free to 2.6%)
• 8450: Household- or laundry-type washing machines, including machines which both wash and dry; parts thereof (11 codes, General duty 1% to 2.6%)
• 8451: Machinery (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 linoleum; machines for reeling, unreeling, folding, cutting or pinking textile fabrics; parts thereof (14 codes, General duty Free to 3.5%)
• 8452: Sewing machines, other than book-sewing machines of heading 8440; furniture, bases and covers specially designed for sewing machines; sewing machine needles; parts thereof (10 codes, General duty Free to 2.5%)
• 8453: Machinery 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 machines; parts thereof (5 codes, General duty Free)
• 8454: Converters, ladles, ingot molds and casting machines, of a kind used in metallurgy or in metal foundries, and parts thereof (10 codes, General duty Free)
• 8455: Metal-rolling mills and rolls therefor; parts thereof (14 codes, General duty Free)
• 8456: Machine 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 processes; water-jet cutting machines (21 codes, General duty Free to 3.5%)
• 8457: Machining centers, unit construction machines (single station) and multistation transfer machines, for working metal (12 codes, General duty 3.3% to 4.2%)
• 8458: Lathes (including turning centers) for removing metal (22 codes, General duty 4.2% to 4.4%)
• 8459: Machine 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 8458 (41 codes, General duty 3.3% to 4.2%)
• 8460: Machine 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 8461 (32 codes, General duty 4.4%)
• 8461: Machine 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 cermets, not elsewhere specified or included (33 codes, General duty 4.4% to 5.8%)
• 8462: Machine tools (including presses) for working metal by forging, hammering or die forging (excluding rolling mills); machine tools (including presses, slitting lines and cut-to-length lines) for working metal by bending, folding, straightening, flattening, shearing, punching, notching or nibbling (excluding drawbenches); presses for working metal or metal carbides, not specified above (71 codes, General duty 4.4%)
• 8463: Other machine tools for working metal or cermets, without removing material (12 codes, General duty 4.4%)
• 8464: Machine tools for working stone, ceramics, concrete, asbestos-cement or like mineral materials or for cold working glass (5 codes, General duty Free to 2%)
• 8465: Machine tools (including machines for nailing, stapling, glueing or otherwise assembling) for working wood, cork, bone, hard rubber, hard plastics or similar hard materials (78 codes, General duty 2.4% to 3%)
• 8466: Parts 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 machines; tool holders for any type of tool for working in the hand (36 codes, General duty Free to 8%)
• 8467: Tools for working in the hand, pneumatic, hydraulic or with self-contained electric or nonelectric motor, and parts thereof (39 codes, General duty Free to 4.5%)
• 8468: Machinery and apparatus for soldering, brazing or welding, whether or not capable of cutting, other than those of heading 8515; gas-operated surface tempering machines and appliances; parts thereof (7 codes, General duty Free to 3.9%)
• 8470: Calculating machines and pocket-size data recording, reproducing and displaying machines with calculating functions; accounting machines, postage-franking machines, ticket-issuing machines and similar machines, incorporating a calculating device; cash registers (9 codes, General duty Free)
• 8471: Automatic data processing machines and units thereof; magnetic or optical readers, machines for transcribing data onto data media in coded form and machines for processing such data, not elsewhere specified or included (28 codes, General duty Free)
• 8472: Other 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) (10 codes, General duty Free to 1.8%)
• 8473: Parts and accessories (other than covers, carrying cases and the like) suitable for use solely or principally with machines of headings 8470 to 8472 (14 codes, General duty Free to 2%)
• 8474: Machinery for sorting, screening, separating, washing, crushing, grinding, mixing or kneading earth, stone, ores or other mineral substances, in solid (including powder or paste) form; machinery for agglomerating, shaping or molding solid mineral fuels, ceramic paste, unhardened cements, plastering materials or other mineral products in powder or paste form; machines for forming foundry molds of sand; parts thereof (16 codes, General duty Free)
• 8475: Machines for assembling electric or electronic lamps, tubes or flashbulbs, in glass envelopes; machines for manufacturing or hot working glass or glassware; parts thereof (5 codes, General duty Free)
• 8476: Automatic goods-vending machines (for example, postage stamp, cigarette, food or beverage machines), including money-changing machines; parts thereof (5 codes, General duty Free)
• 8477: Machinery for working rubber or plastics or for the manufacture of products from these materials, not specified or included elsewhere in this chapter; parts thereof (28 codes, General duty Free to 3.1%)
• 8478: Machinery for preparing or making up tobacco, not specified or included elsewhere in this chapter; parts thereof (4 codes, General duty Free)
• 8479: Machines and mechanical appliances having individual functions, not specified or included elsewhere in this chapter; parts thereof (41 codes, General duty Free to 2.8%)
• 8480: Molding boxes for metal foundry; mold bases; molding patterns; molds for metal (other than ingot molds), metal carbides, glass, mineral materials, rubber or plastics (19 codes, General duty Free to 3.8%)
• 8481: Taps, cocks, valves and similar appliances, for pipes, boiler shells, tanks, vats or the like, including pressure-reducing valves and thermostatically controlled valves; parts thereof (61 codes, General duty Free to 5.6%)
• 8482: Ball or roller bearings, and parts thereof (56 codes, General duty 2.4% to 9.9%)
• 8483: Transmission shafts (including camshafts and crankshafts) and cranks; bearing housings, housed bearings and plain shaft bearings; gears and gearing; ball or roller screws; gear boxes and other speed changers, including torque converters; flywheels and pulleys, including pulley blocks; clutches and shaft couplings (including universal joints); parts thereof (47 codes, General duty Free to 5.7%, some per unit)
• 8484: Gaskets and similar joints of metal sheeting combined with other material or of two or more layers of metal; sets or assortments of gaskets and similar joints, dissimilar in composition, put up in pouches, envelopes or similar packings; mechanical seals (3 codes, General duty 2.5% to 3.9%)
• 8485: Machines for additive manufacturing (6 codes, General duty Free to 3.1%)
• 8486: Machines 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 displays; machines and apparatus specified in note 11(C) to this chapter; parts and accessories (7 codes, General duty Free)
• 8487: Machinery parts, not containing electrical connectors, insulators, coils, contacts or other electrical features, and not specified or included elsewhere in this chapter (4 codes, General duty Free to 3.9%)

Where it sits in the schedule

Chapter 84 is in Section XVI of the Harmonized System, machinery and electrical equipment (chapters 84 to 85). Rates are those printed in the 2026 HTS Revision 23; Chapter 99 duties (Section 232, Section 301, IEEPA) are charged on top and are not included.