# United States tariff line 8471.70.20.00: Units for physical incorporation into automatic data processing machines or units thereof > In the United States tariff, line 8471.70.20.00 covers storage units, magnetic disk drive units, for a disk of a diameter exceeding 21 cm, units for physical incorporation into automatic data processing machines or units thereof. Goods under this line enter free of general (MFN) duty. It falls under HS subheading 8471.70 in heading 84.71 (chapter 84). Source: https://border.bot/countries/united-states/hs-codes/8471702000 Last updated: 9 October 2026 [Countries](https://border.bot/countries) / [United States](https://border.bot/countries/united-states) / [Chapter 84](https://border.bot/countries/united-states/hs-codes/84) / [8471.70](https://border.bot/countries/united-states/hs-codes/847170) / [8471.70.20.00](https://border.bot/countries/united-states/hs-codes/8471702000) ## Key facts - Tariff line: 8471.70.20.00 - Covers: Storage units, magnetic disk drive units, for a disk of a diameter exceeding 21 cm, units for physical incorporation into automatic data processing machines or units thereof - Duty (MFN): Free - Additional duties: None recorded - Restrictions: None recorded - Tariff: [United States](https://border.bot/countries/united-states) - HS subheading: [8471.70](https://border.bot/hs-codes/847170) ## What this line covers In the United States tariff, line 8471.70.20.00 covers storage units, magnetic disk drive units, for a disk of a diameter exceeding 21 cm, units for physical incorporation into automatic data processing machines or units thereof. Its legal text is “Units for physical incorporation into automatic data processing machines or units thereof”, read under “Storage units”, “Magnetic disk drive units” and “For a disk of a diameter exceeding 21 cm”. ## How it is structured It falls under HS subheading 8471.70 in heading 84.71 (chapter 84). The first six digits are the Harmonized System code; the 4 digits after them are added by the United States tariff. - Chapter 84: Nuclear reactors, boilers, machinery and mechanical appliances; parts thereof - Heading 84.71: 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 - Subheading 8471.70: Storage units - Within the subheading: Magnetic disk drive units - Within the subheading: For a disk of a diameter exceeding 21 cm - Line 8471.70.20.00: Units for physical incorporation into automatic data processing machines or units thereof ## Duty Goods under this line enter free of general (MFN) duty. ## In other countries No other national tariff on border.bot has live lines under 8471.70 yet. - [The Harmonized System text for 8471.70](https://border.bot/hs-codes/847170) ## Other lines under 8471.70 - [8471.70.10.00](https://border.bot/countries/united-states/hs-codes/8471701000) Without read-write unit assembled therein; read-write units entered separately - [8471.70.30.00](https://border.bot/countries/united-states/hs-codes/8471703000) Other - [8471.70.40.35](https://border.bot/countries/united-states/hs-codes/8471704035) Flexible (floppy) magnetic disk drive units - [8471.70.40.65](https://border.bot/countries/united-states/hs-codes/8471704065) Hard magnetic disk drive units - [8471.70.40.95](https://border.bot/countries/united-states/hs-codes/8471704095) Other - [8471.70.50.35](https://border.bot/countries/united-states/hs-codes/8471705035) Flexible (floppy) magnetic disk drive units - [8471.70.50.65](https://border.bot/countries/united-states/hs-codes/8471705065) Hard magnetic disk drive units - [8471.70.50.95](https://border.bot/countries/united-states/hs-codes/8471705095) Other - [8471.70.60.00](https://border.bot/countries/united-states/hs-codes/8471706000) Not assembled in cabinets for placing on a table, desk, wall, floor or similar place - [8471.70.90.00](https://border.bot/countries/united-states/hs-codes/8471709000) Other - Previous line: [8471.70.10.00](https://border.bot/countries/united-states/hs-codes/8471701000) Without read-write unit assembled therein; read-write units entered separately - Next line: [8471.70.30.00](https://border.bot/countries/united-states/hs-codes/8471703000) Other ## Frequently asked questions ### What does tariff line 8471.70.20.00 cover in the United States tariff? In the United States tariff, line 8471.70.20.00 covers storage units, magnetic disk drive units, for a disk of a diameter exceeding 21 cm, units for physical incorporation into automatic data processing machines or units thereof. ### What is the general (MFN) duty on 8471.70.20.00 in the United States? Goods under this line enter free of general (MFN) duty. ## 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: - https://hts.usitc.gov/reststop/exportList?from=0000000000&to=9999999999&format=CSV&styles=false Machine-readable: https://border.bot/countries/united-states/hs-codes/8471702000.json