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HSChapter 84
U.S. imports of parts for industrial temperature-change machinery, plant & laboratory equipment (HS 841990) totaled $227.9M in June 2026, traded with 68 countries.
Importers of Parts for Industrial Temperature-Change Machinery, Plant & Laboratory Equipment paid $24.9M in duties in June 2026 — an effective duty rate of 15% on $169.5M in dutiable value, based on actual customs collections rather than the published tariff schedule. Parts for Industrial Temperature-Change Machinery, Plant & Laboratory Equipment imports of $227.9M in June 2026 ran 23% above the year-to-date monthly average of $185.3M.
Last updated: June 2026 dataMexico leads US imports of replacement and service parts for industrial temperature-change equipment, reflecting deep cross-border manufacturing integration, with China and Canada also major sources. The US schedule is notably granular: dedicated lines cover parts of instantaneous or storage water heaters (8419901000), heat exchange units (8419903000), pulp and paper plant (8419902000), medical and laboratory sterilizers (8419905040, 8419909540), restaurant and similar food-service equipment (8419909520), and acrylic acid reactor machinery (8419905080). Correct parts classification requires tracing the parent equipment's tariff line, as the parts schedule mirrors the equipment hierarchy. Section 301 tariffs may apply to Chinese-origin parts.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
Parts classification under 841990 generally follows the principal machine the part is designed for. When a part is dedicated to a specific type of equipment — such as a heat exchanger (8419903000) or a sterilizer (8419905040/8419909540) — it should be classified under that specific line. For parts usable across multiple equipment types, the NESOI lines (8419909550 or 8419909580) apply. A binding ruling from CBP can provide certainty for high-volume or ambiguous parts.
Yes — 8419909520 specifically covers parts of equipment for restaurants and similar food-service establishments that involve temperature change. This mirrors the parent equipment line under 841981 for restaurant/hotel use, and importers should use this dedicated line rather than the general NESOI parts lines when the parent equipment is clearly food-service oriented.
Monthly import values over time
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HS10 import codes under this HS6 parent. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Import Value | Effective Tariff % | Dutiable Share | Duty Collected |
|---|---|---|---|---|---|
| 8419903000 | PARTS OF HEAT EXCHANGE UNITS, INDUSTRIAL | $114.5M | 9.37% | 70.50% | $10.7M |
| 8419909580 | PARTS,MACH,PLANT EQUIP,TREAT MATERL,TEMP CHG,NESOI | $80.4M | 12.69% | 79.52% | $10.2M |
| 8419909520 | PARTS OF EQUIP FOR RESTAURANTS,ETC, TEMP CHANGE | $13.1M | 16.28% | 86.06% | $2.1M |
| 8419901000 | PARTS OF INSTANTANEOUS OR STORAGE WATER HEATERS | $9.5M | 9.13% | 56.52% | $866K |
| 8419908500 | ELECTROMECHANICAL HAND TOOL PARTS, NESOI | $6.3M | 9.54% | 92.38% | $596K |
| 8419905040 | PARTS OF MEDICAL, SURGICAL OR LABORATORY STERILIZE | $2.6M | 7.11% | 54.43% | $184K |
| 8419902000 | PARTS OF MACH & PLANT FOR MAKING PULP,PAPER,PAPBRD | $1.2M | 12.24% | 76.60% | $144K |
| 8419905080 | PRTS,MACH,TREAT MATERL,TEMP CHG,OF ACRYL ACD REACT | $346K | 5.65% | 48.06% | $20K |
PARTS OF HEAT EXCHANGE UNITS, INDUSTRIAL
PARTS,MACH,PLANT EQUIP,TREAT MATERL,TEMP CHG,NESOI
PARTS OF EQUIP FOR RESTAURANTS,ETC, TEMP CHANGE
PARTS OF INSTANTANEOUS OR STORAGE WATER HEATERS
ELECTROMECHANICAL HAND TOOL PARTS, NESOI
PARTS OF MEDICAL, SURGICAL OR LABORATORY STERILIZE
PARTS OF MACH & PLANT FOR MAKING PULP,PAPER,PAPBRD
PRTS,MACH,TREAT MATERL,TEMP CHG,OF ACRYL ACD REACT
HS10 export codes under this HS6 parent. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 8419909550 | PARTS F MCH OR EQUIP F TREAT MTL BY TEMP CHG,NESOI | $57.3M |
| 8419909520 | PARTS OF EQUIP FOR RESTAURANTS,ETC, TEMP CHANGE | $14.5M |
| 8419909540 | PARTS OF MEDICAL, SURGICAL OR LABORATORY STERILIZE | $4.5M |
| 8419902000 | PARTS OF MACH & PLANT FOR MAKING PULP,PAPER,PAPBRD | $2.5M |
| 8419908500 | ELECTROMECHANICAL HAND TOOL PARTS, NESOI | $630K |
PARTS F MCH OR EQUIP F TREAT MTL BY TEMP CHG,NESOI
1.2M kg
PARTS OF EQUIP FOR RESTAURANTS,ETC, TEMP CHANGE
170.7K kg
PARTS OF MEDICAL, SURGICAL OR LABORATORY STERILIZE
16.1K kg
PARTS OF MACH & PLANT FOR MAKING PULP,PAPER,PAPBRD
54.8K kg
ELECTROMECHANICAL HAND TOOL PARTS, NESOI
6.0K kg
TURBOJET AND TURBOPROLLER PARTS
HS 841191
| State | Imports | Exports | Balance |
|---|---|---|---|
| Texas | $46.8M | $5.9M | -$40.9M |
| Mississippi | $25.6M | -- | -$25.6M |
| California | $15.5M | $9.4M | -$6.0M |
| Port | Imports | Exports | Balance |
|---|---|---|---|
| LOS ANGELES, CA | $32.1M | -- | -$32.1M |
| CHICAGO, IL | $24.6M | $6.0M | -$18.6M |
| LAREDO, TX | $17.6M | $4.7M | -$12.9M |