{
  "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": "8480",
        "description": "Moulding boxes for metal foundry; mould bases; moulding patterns; moulds for metal (other than ingot moulds), metal carbides, glass, mineral materials, rubber or plastics",
        "subheadings": [
          {
            "code": "848071",
            "description": "Moulds for rubber or plastics: Injection or compression types"
          },
          {
            "code": "848079",
            "description": "Moulds for rubber or plastics: Other"
          }
        ]
      },
      {
        "code": "8481",
        "description": "Taps, cocks, valves and similar appliances for pipes, boiler shells, tanks, vats or the like, including pressure-reducing valves and thermostatically controlled valves",
        "subheadings": [
          {
            "code": "848110",
            "description": "Pressure-reducing valves"
          },
          {
            "code": "848120",
            "description": "Valves for oleohydraulic or pneumatic transmissions"
          },
          {
            "code": "848130",
            "description": "Check (nonreturn) valves"
          },
          {
            "code": "848140",
            "description": "Safety or relief valves"
          },
          {
            "code": "848180",
            "description": "Other appliances"
          },
          {
            "code": "848190",
            "description": "Parts"
          }
        ]
      },
      {
        "code": "8482",
        "description": "Ball or roller bearings",
        "subheadings": [
          {
            "code": "848210",
            "description": "Ball bearings"
          },
          {
            "code": "848220",
            "description": "Tapered roller bearings, including cone and tapered roller assemblies"
          },
          {
            "code": "848230",
            "description": "Spherical roller bearings"
          },
          {
            "code": "848240",
            "description": "Needle roller bearings, including cage and needle roller assemblies"
          },
          {
            "code": "848250",
            "description": "Other cylindrical roller bearings, including cage and roller assemblies"
          },
          {
            "code": "848280",
            "description": "Other, including combined ball/roller bearings"
          },
          {
            "code": "848291",
            "description": "Parts: Balls, needles and rollers"
          },
          {
            "code": "848299",
            "description": "Parts: Other"
          }
        ]
      },
      {
        "code": "8483",
        "description": "Transmission shafts (including cam shafts and crank shafts) and cranks; bearing housings 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)",
        "subheadings": [
          {
            "code": "848310",
            "description": "Transmission shafts (including cam shafts and crank shafts) and cranks"
          },
          {
            "code": "848320",
            "description": "Bearing housings, incorporating ball or roller bearings"
          },
          {
            "code": "848330",
            "description": "Bearing housings, not incorporating ball or roller bearings; plain shaft bearings"
          },
          {
            "code": "848340",
            "description": "Gears and gearing, other than toothed wheels, chain sprockets and other transmission elements presented separately; ball or roller screws; gear boxes and other speed changers, including torque converters"
          },
          {
            "code": "848350",
            "description": "Flywheels and pulleys, including pulley blocks"
          },
          {
            "code": "848360",
            "description": "Clutches and shaft couplings (including universal joints)"
          },
          {
            "code": "848390",
            "description": "Toothed wheels, chain sprockets and other transmission elements presented separately; parts"
          }
        ]
      },
      {
        "code": "8484",
        "description": "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",
        "subheadings": [
          {
            "code": "848410",
            "description": "Gaskets and similar joints of metal sheeting combined with other material or of two or more layers of metal"
          },
          {
            "code": "848420",
            "description": "Mechanical seals"
          },
          {
            "code": "848490",
            "description": "Other"
          }
        ]
      },
      {
        "code": "8485",
        "description": "Machines for additive manufacturing",
        "subheadings": [
          {
            "code": "848510",
            "description": "By metal deposit"
          },
          {
            "code": "848520",
            "description": "By plastics or rubber deposit"
          },
          {
            "code": "848530",
            "description": "By plaster, cement, ceramics or glass deposit"
          },
          {
            "code": "848580",
            "description": "Other"
          },
          {
            "code": "848590",
            "description": "Parts"
          }
        ]
      },
      {
        "code": "8486",
        "description": "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",
        "subheadings": [
          {
            "code": "848610",
            "description": "Machines and apparatus for the manufacture of boules or wafers"
          },
          {
            "code": "848620",
            "description": "Machines and apparatus for the manufacture of semiconductor devices or of electronic integrated circuits"
          },
          {
            "code": "848630",
            "description": "Machines and apparatus for the manufacture of flat panel displays"
          },
          {
            "code": "848640",
            "description": "Machines and apparatus specified in Note 11 (C) to this Chapter"
          },
          {
            "code": "848690",
            "description": "Parts and accessories"
          }
        ]
      },
      {
        "code": "8487",
        "description": "Machinery parts, not containing electrical connectors, insulators, coils, contacts or other electrical features, not specified or included elsewhere in this Chapter",
        "subheadings": [
          {
            "code": "848710",
            "description": "Ships' or boats' propellers and blades therefor"
          },
          {
            "code": "848790",
            "description": "Other"
          }
        ]
      }
    ],
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      "code": "83",
      "description": "Miscellaneous articles of base metal",
      "indexable": true
    },
    "next": {
      "code": "85",
      "description": "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",
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    "schedules": [
      {
        "code": "US",
        "name": "United States",
        "slug": "united-states",
        "lines": 1706,
        "members": 1
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    ],
    "provenance": [
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        "dataset": "GLOBAL:hs",
        "country": "GLOBAL",
        "kind": "hs",
        "seq": 2,
        "version": "mytraddal hs2022.csv (HS 2022)",
        "liveAt": "2026-10-11T06:04:17.693Z",
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  "code": "84",
  "attribution": "border.bot tariff reference (border.bot), compiled from the official publishers named on each page.",
  "terms": "https://border.bot/legal/terms",
  "notice": "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.",
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