HS 8404 — Auxiliary plant for use with boilers of heading 8402 or 8403 (for example, economizers, super-heaters, soot removers, gas recoverers)
HS heading 8404 (Auxiliary plant for use with boilers of heading 8402 or 8403 (for example, economizers, super-heaters, soot removers, gas recoverers)) spans 3 products in U.S. import records, with 12,533 bill-of-lading shipments. The most imported are Condensers for steam or other vapor power units, Parts of auxiliary plant for use with boilers of heading 8402 or 8403 (for example, economizers, super-heaters, soot removers, gas recoverers), and Auxiliary plant for use with boilers of heading 8402 or 8403.
Part of Chapter 84: Nuclear reactors, boilers, machinery and mechanical appliances
Sourced from U.S. Customs bill of lading data · Updated monthly · Data through August 2026Cite as: ImportDoor, U.S. Customs bill of lading data (data through August 2026), https://www.importdoor.com/products/heading/8404
Products under this heading
Frequently asked questions about HS 8404
What is HS code 8404?
HS 8404 covers auxiliary plant for use with boilers of heading 8402 or 8403. It is a 4-digit heading in chapter 84 (Nuclear reactors, boilers, machinery and mechanical appliances) of the Harmonized System, with 3 six-digit subheadings that appear in U.S. import records.
How many U.S. import shipments fall under HS 8404?
ImportDoor has 12,533 U.S. Customs bill-of-lading shipment records under HS heading 8404, updated monthly.
What is the most imported product under HS 8404?
Condensers for steam or other vapor power units (HS 840420) leads with 10,483 shipments, followed by Parts of auxiliary plant for use with boilers of heading 8402 or 8403 (HS 840490) and Auxiliary plant for use with boilers of heading 8402 or 8403 (HS 840410).