{
  "summary": "HS chapter 84 covers nuclear reactors, boilers, machinery and mechanical appliances; parts thereof. It has 86 headings, 84.01 to 84.87, and 538 six-digit subheadings in HS2022. National tariff lines under chapter 84 are live on border.bot for the United States (1,706 lines, also used by 1 other country).",
  "updatedAt": "2026-10-11",
  "facts": [
    {
      "label": "Chapter",
      "value": "84",
      "source": "border.bot release GLOBAL:hs #2"
    },
    {
      "label": "Description",
      "value": "Nuclear reactors, boilers, machinery and mechanical appliances; parts thereof",
      "source": "border.bot release GLOBAL:hs #2"
    },
    {
      "label": "Headings",
      "value": "86",
      "source": "border.bot release GLOBAL:hs #2"
    },
    {
      "label": "Subheadings",
      "value": "538",
      "source": "border.bot release GLOBAL:hs #2"
    },
    {
      "label": "Edition",
      "value": "HS2022",
      "source": "border.bot release GLOBAL:hs #2"
    }
  ],
  "faq": [
    {
      "question": "What does HS chapter 84 cover?",
      "answer": "HS chapter 84 covers nuclear reactors, boilers, machinery and mechanical appliances; parts thereof."
    },
    {
      "question": "How many headings and subheadings are in HS chapter 84?",
      "answer": "HS chapter 84 has 86 headings and 538 six-digit subheadings in HS2022."
    },
    {
      "question": "Which countries’ tariffs list national lines in HS chapter 84?",
      "answer": "National tariff lines under chapter 84 are live on border.bot for the United States (1,706 lines, also used by 1 other country)."
    }
  ],
  "sections": [
    {
      "id": "covers",
      "title": "What this chapter covers",
      "text": [
        "HS chapter 84 covers nuclear reactors, boilers, machinery and mechanical appliances; parts thereof.",
        "It has 86 headings, 84.01 to 84.87, and 538 six-digit subheadings in HS2022."
      ]
    },
    {
      "id": "not-covered",
      "title": "What it doesn’t cover",
      "text": [
        "Chapter 83, before it, covers miscellaneous articles of base metal; chapter 85, after it, covers electrical machinery and equipment and parts thereof; sound recorders and reproducers, television image and sound recorders and reproducers, and parts and accessories of such articles."
      ]
    },
    {
      "id": "structure",
      "title": "How it is structured",
      "text": [
        "Chapter 84 is the first level of the Harmonized System. Its headings add two digits to the chapter number (84.01), and each heading's subheadings add two more."
      ]
    },
    {
      "id": "other-countries",
      "title": "In other countries",
      "text": [
        "National tariff lines under chapter 84 are live on border.bot for the United States (1,706 lines, also used by 1 other country)."
      ]
    },
    {
      "id": "sources",
      "title": "Sources and updates",
      "text": [
        "The Harmonized System legal text comes from border.bot release 2 (edition HS 2022), imported from a file, and has been live since 11 October 2026.",
        "This page was last updated on 11 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."
      ]
    }
  ],
  "data": {
    "type": "hs-chapter",
    "edition": "HS2022",
    "chapter": {
      "code": "84",
      "description": "Nuclear reactors, boilers, machinery and mechanical appliances; parts thereof"
    },
    "headings": [
      {
        "code": "8431",
        "description": "Parts suitable for use solely or principally with the machinery of headings 84.25 to 84.30",
        "subheadings": [
          {
            "code": "843142",
            "description": "Of machinery of heading 8426, 8429 or 8430: Bulldozer or angledozer blades"
          },
          {
            "code": "843143",
            "description": "Of machinery of heading 8426, 8429 or 8430: Parts for boring or sinking machinery of subheading 8430 41 or 8430 49"
          },
          {
            "code": "843149",
            "description": "Of machinery of heading 8426, 8429 or 8430: Other"
          }
        ]
      },
      {
        "code": "8432",
        "description": "Agricultural, horticultural or forestry machinery for soil preparation or cultivation; lawn or sports-ground rollers",
        "subheadings": [
          {
            "code": "843210",
            "description": "Ploughs"
          },
          {
            "code": "843221",
            "description": "Harrows, scarifiers, cultivators, weeders and hoes: Disc harrows"
          },
          {
            "code": "843229",
            "description": "Harrows, scarifiers, cultivators, weeders and hoes: Other"
          },
          {
            "code": "843231",
            "description": "Seeders, planters and transplanters: No-till direct seeders, planters and transplanters"
          },
          {
            "code": "843239",
            "description": "Seeders, planters and transplanters: Other"
          },
          {
            "code": "843241",
            "description": "Manure spreaders and fertiliser distributors: Manure spreaders"
          },
          {
            "code": "843242",
            "description": "Manure spreaders and fertiliser distributors: Fertiliser distributors"
          },
          {
            "code": "843280",
            "description": "Other machinery"
          },
          {
            "code": "843290",
            "description": "Parts"
          }
        ]
      },
      {
        "code": "8433",
        "description": "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 84.37",
        "subheadings": [
          {
            "code": "843311",
            "description": "Mowers for lawns, parks or sports grounds: Powered, with the cutting device rotating in a horizontal plane"
          },
          {
            "code": "843319",
            "description": "Mowers for lawns, parks or sports grounds: Other"
          },
          {
            "code": "843320",
            "description": "Other mowers, including cutter bars for tractor mounting"
          },
          {
            "code": "843330",
            "description": "Other haymaking machinery"
          },
          {
            "code": "843340",
            "description": "Straw or fodder balers, including pick-up balers"
          },
          {
            "code": "843351",
            "description": "Other harvesting machinery; threshing machinery: Combine harvester-threshers"
          },
          {
            "code": "843352",
            "description": "Other harvesting machinery; threshing machinery: Other threshing machinery"
          },
          {
            "code": "843353",
            "description": "Other harvesting machinery; threshing machinery: Root or tuber harvesting machines"
          },
          {
            "code": "843359",
            "description": "Other harvesting machinery; threshing machinery: Other"
          },
          {
            "code": "843360",
            "description": "Machines for cleaning, sorting or grading eggs, fruit or other agricultural produce"
          },
          {
            "code": "843390",
            "description": "Parts"
          }
        ]
      },
      {
        "code": "8434",
        "description": "Milking machines and dairy machinery",
        "subheadings": [
          {
            "code": "843410",
            "description": "Milking machines"
          },
          {
            "code": "843420",
            "description": "Dairy machinery"
          },
          {
            "code": "843490",
            "description": "Parts"
          }
        ]
      },
      {
        "code": "8435",
        "description": "Presses, crushers and similar machinery used in the manufacture of wine, cider, fruit juices or similar beverages",
        "subheadings": [
          {
            "code": "843510",
            "description": "Machinery"
          },
          {
            "code": "843590",
            "description": "Parts"
          }
        ]
      },
      {
        "code": "8436",
        "description": "Other agricultural, horticultural, forestry, poultry-keeping or bee-keeping machinery, including germination plant fitted with mechanical or thermal equipment; poultry incubators and brooders",
        "subheadings": [
          {
            "code": "843610",
            "description": "Machinery for preparing animal feeding stuffs"
          },
          {
            "code": "843621",
            "description": "Poultry-keeping machinery; poultry incubators and brooders: Poultry incubators and brooders"
          },
          {
            "code": "843629",
            "description": "Poultry-keeping machinery; poultry incubators and brooders: Other"
          },
          {
            "code": "843680",
            "description": "Other machinery"
          },
          {
            "code": "843691",
            "description": "Parts: Of poultry-keeping machinery or poultry incubators and brooders"
          },
          {
            "code": "843699",
            "description": "Parts: Other"
          }
        ]
      },
      {
        "code": "8437",
        "description": "Machines for cleaning, sorting or grading seed, grain or dried leguminous vegetables; machinery used in the milling industry or for the working of cereals or dried leguminous vegetables, other than farm-type machinery",
        "subheadings": [
          {
            "code": "843710",
            "description": "Machines for cleaning, sorting or grading seed, grain or dried leguminous vegetables"
          },
          {
            "code": "843780",
            "description": "Other machinery"
          },
          {
            "code": "843790",
            "description": "Parts"
          }
        ]
      },
      {
        "code": "8438",
        "description": "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",
        "subheadings": [
          {
            "code": "843810",
            "description": "Bakery machinery and machinery for the manufacture of macaroni, spaghetti or similar products"
          },
          {
            "code": "843820",
            "description": "Machinery for the manufacture of confectionery, cocoa or chocolate"
          },
          {
            "code": "843830",
            "description": "Machinery for sugar manufacture"
          },
          {
            "code": "843840",
            "description": "Brewery machinery"
          },
          {
            "code": "843850",
            "description": "Machinery for the preparation of meat or poultry"
          },
          {
            "code": "843860",
            "description": "Machinery for the preparation of fruits, nuts or vegetables"
          },
          {
            "code": "843880",
            "description": "Other machinery"
          },
          {
            "code": "843890",
            "description": "Parts"
          }
        ]
      },
      {
        "code": "8439",
        "description": "Machinery for making pulp of fibrous cellulosic material or for making or finishing paper or paperboard",
        "subheadings": [
          {
            "code": "843910",
            "description": "Machinery for making pulp of fibrous cellulosic material"
          },
          {
            "code": "843920",
            "description": "Machinery for making paper or paperboard"
          },
          {
            "code": "843930",
            "description": "Machinery for finishing paper or paperboard"
          },
          {
            "code": "843991",
            "description": "Parts: Of machinery for making pulp of fibrous cellulosic material"
          },
          {
            "code": "843999",
            "description": "Parts: Other"
          }
        ]
      },
      {
        "code": "8440",
        "description": "Book-binding machinery, including book-sewing machines",
        "subheadings": [
          {
            "code": "844010",
            "description": "Machinery"
          },
          {
            "code": "844090",
            "description": "Parts"
          }
        ]
      },
      {
        "code": "8441",
        "description": "Other machinery for making up paper pulp, paper or paperboard, including cutting machines of all kinds",
        "subheadings": [
          {
            "code": "844110",
            "description": "Cutting machines"
          },
          {
            "code": "844120",
            "description": "Machines for making bags, sacks or envelopes"
          },
          {
            "code": "844130",
            "description": "Machines for making cartons, boxes, cases, tubes, drums or similar containers, other than by moulding"
          },
          {
            "code": "844140",
            "description": "Machines for moulding articles in paper pulp, paper or paperboard"
          },
          {
            "code": "844180",
            "description": "Other machinery"
          },
          {
            "code": "844190",
            "description": "Parts"
          }
        ]
      },
      {
        "code": "8442",
        "description": "Machinery, apparatus and equipment (other than the machines of headings 84.56 to 84.65) 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)",
        "subheadings": [
          {
            "code": "844230",
            "description": "Machinery, apparatus and equipment"
          },
          {
            "code": "844240",
            "description": "Parts of the foregoing machinery, apparatus or equipment"
          },
          {
            "code": "844250",
            "description": "Plates, cylinders and other printing components; plates, cylinders and lithographic stones, prepared for printing purposes (for example, planed, grained or polished)"
          }
        ]
      },
      {
        "code": "8443",
        "description": "Printing machinery used for printing by means of plates, cylinders and other printing components of heading 84.42; other printers, copying machines and facsimile machines, whether or not combined; parts and accessories thereof",
        "subheadings": [
          {
            "code": "844311",
            "description": "Printing machinery used for printing by means of plates, cylinders and other printing components of heading 8442: Offset printing machinery, reel-fed"
          },
          {
            "code": "844312",
            "description": "Printing machinery used for printing by means of plates, cylinders and other printing components of heading 8442: Offset printing machinery, sheet-fed, office type (using sheets with one side not exceeding 22cm and the other side not exceeding 36cm in the unfolded state)"
          },
          {
            "code": "844313",
            "description": "Printing machinery used for printing by means of plates, cylinders and other printing components of heading 8442: Other offset printing machinery"
          },
          {
            "code": "844314",
            "description": "Printing machinery used for printing by means of plates, cylinders and other printing components of heading 8442: Letterpress printing machinery, reel fed, excluding flexographic printing"
          },
          {
            "code": "844315",
            "description": "Printing machinery used for printing by means of plates, cylinders and other printing components of heading 8442: Letterpress printing machinery, other than reel fed, excluding flexographic printing"
          },
          {
            "code": "844316",
            "description": "Printing machinery used for printing by means of plates, cylinders and other printing components of heading 8442: Flexographic printing machinery"
          },
          {
            "code": "844317",
            "description": "Printing machinery used for printing by means of plates, cylinders and other printing components of heading 8442: Gravure printing machinery"
          },
          {
            "code": "844319",
            "description": "Printing machinery used for printing by means of plates, cylinders and other printing components of heading 8442: Other"
          },
          {
            "code": "844331",
            "description": "Other printers, copying machines and facsimile machines, whether or not combined: Machines which perform two or more of the functions of printing, copying or facsimile transmission, capable of connecting to an automatic data processing machine or to a network"
          },
          {
            "code": "844332",
            "description": "Other printers, copying machines and facsimile machines, whether or not combined: Other, capable of connecting to an automatic data processing machine or to a network"
          },
          {
            "code": "844339",
            "description": "Other printers, copying machines and facsimile machines, whether or not combined: Other"
          },
          {
            "code": "844391",
            "description": "Parts and accessories: Parts and accessories of printing machinery used for printing by means of plates, cylinders and other printing components of heading 84.42"
          },
          {
            "code": "844399",
            "description": "Parts and accessories: Other"
          }
        ]
      },
      {
        "code": "8444",
        "description": "Machines for extruding, drawing, texturing or cutting man- made textile materials",
        "subheadings": [
          {
            "code": "844400",
            "description": "Machines for extruding, drawing, texturing or cutting man- made textile materials"
          }
        ]
      },
      {
        "code": "8445",
        "description": "Machines for preparing textile fibres; 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 84.46 or 84.47",
        "subheadings": [
          {
            "code": "844511",
            "description": "Machines for preparing textile fibres: Carding machines"
          },
          {
            "code": "844512",
            "description": "Machines for preparing textile fibres: Combing machines"
          },
          {
            "code": "844513",
            "description": "Machines for preparing textile fibres: Drawing or roving machines"
          },
          {
            "code": "844519",
            "description": "Machines for preparing textile fibres: Other"
          },
          {
            "code": "844520",
            "description": "Textile spinning machines"
          },
          {
            "code": "844530",
            "description": "Textile doubling or twisting machines"
          },
          {
            "code": "844540",
            "description": "Textile winding (including weft-winding) or reeling machines"
          },
          {
            "code": "844590",
            "description": "Other"
          }
        ]
      },
      {
        "code": "8446",
        "description": "Weaving machines (looms)",
        "subheadings": [
          {
            "code": "844610",
            "description": "For weaving fabrics of a width not exceeding 30cm"
          },
          {
            "code": "844621",
            "description": "For weaving fabrics of a width exceeding 30 cm, shuttle type: Power looms"
          },
          {
            "code": "844629",
            "description": "For weaving fabrics of a width exceeding 30 cm, shuttle type: Other"
          },
          {
            "code": "844630",
            "description": "For weaving fabrics of a width exceeding 30cm, shuttleless type"
          }
        ]
      },
      {
        "code": "8447",
        "description": "Knitting machines, stitch-bonding machines and machines for making gimped yarn, tulle, lace, embroidery, trimmings, braid or net and machines for tufting",
        "subheadings": [
          {
            "code": "844711",
            "description": "Circular knitting machines: With cylinder diameter not exceeding 165mm"
          },
          {
            "code": "844712",
            "description": "Circular knitting machines: With cylinder diameter exceeding 165mm"
          },
          {
            "code": "844720",
            "description": "Flat knitting machines; stitch-bonding machines"
          },
          {
            "code": "844790",
            "description": "Other"
          }
        ]
      },
      {
        "code": "8448",
        "description": "Auxiliary machinery for use with machines of heading 8444, 8445, 8446 or 8447 (for example, dobbies, jacquards, automatic stop motions, 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)",
        "subheadings": [
          {
            "code": "844811",
            "description": "Auxiliary machinery for machines of heading 8444, 8445, 8446 or 8447: Dobbies and Jacquards; card reducing, copying, punching or assembling machines for use therewith"
          },
          {
            "code": "844819",
            "description": "Auxiliary machinery for machines of heading 8444, 8445, 8446 or 8447: Other"
          },
          {
            "code": "844820",
            "description": "Parts and accessories of machines of heading 84.44 or of their auxiliary machinery"
          },
          {
            "code": "844831",
            "description": "Parts and accessories of machines of heading 8445 or of their auxiliary machinery: Card clothing"
          },
          {
            "code": "844832",
            "description": "Parts and accessories of machines of heading 8445 or of their auxiliary machinery: Of machines for preparing textile fibres, other than card clothing"
          },
          {
            "code": "844833",
            "description": "Parts and accessories of machines of heading 8445 or of their auxiliary machinery: Spindles, spindle flyers, spinning rings and ring travellers"
          },
          {
            "code": "844839",
            "description": "Parts and accessories of machines of heading 8445 or of their auxiliary machinery: Other"
          },
          {
            "code": "844842",
            "description": "Parts and accessories of weaving machines (looms) or of their auxiliary machinery: Reeds for looms, healds and heald-frames"
          },
          {
            "code": "844849",
            "description": "Parts and accessories of weaving machines (looms) or of their auxiliary machinery: Other"
          }
        ]
      }
    ],
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        "code": "US",
        "name": "United States",
        "slug": "united-states",
        "lines": 1706,
        "members": 1
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