U.S. imports of Parts for Temperature-Changing Industrial & Laboratory Machinery (SITC 74190) totaled $272.6M in August 2026, imported from 73 countries.
Importers of Parts for Temperature-Changing Industrial & Laboratory Machinery paid $41.4M in duties in August 2026, an average duty rate of 15.32% — duty actually collected as a share of the imports that cleared customs, not the published tariff schedule. Parts for Temperature-Changing Industrial & Laboratory Machinery imports of $272.6M in August 2026 ran 35% above the year-to-date monthly average of $202.2M.
Last updated: August 2026 dataClassified as not elsewhere specified (N.E.S.), these replacement and component parts serve industrial and laboratory equipment designed to change or maintain temperature — including heat exchangers, industrial furnaces, ovens, and cooling apparatus. The N.E.S. designation means classification here is residual: importers must confirm that no more specific SITC heading captures the part before using this code. Correct classification often hinges on whether the part is identifiable as belonging to a specific machine type, which can affect applicable duty rates and trade-remedy exposure.
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8.2K import shipments a month
A part is classified as N.E.S. only when no other SITC heading more precisely describes it. If the part is identifiable as belonging to a specific type of temperature-changing machine — such as a refrigeration compressor or a specific heat exchanger — it should be classified under that machine's dedicated heading. Consult a licensed customs broker to confirm the correct classification.
Depending on the country of origin and the specific HTS subheading, parts for industrial machinery can be subject to Section 301 tariffs or antidumping/countervailing duty orders. Importers should verify the applicable 10-digit HTS code and check current trade-remedy orders with CBP before entry.
Basic heading 86 of 642 in section 7
Basic heading 74190 · $272.6M of $172.0B
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Imports · August 2026
origin
China and Taiwan together supply 47% of it. China pays 36.0% duty; Mexico 0.5%.
customs district
Census does not publish district detail for this classification system.
destination
Census does not publish state detail for this classification system.
entry
Census does not publish port detail for this classification system.
ImportsExports
Imports
$272.6MYoY · free account
Exports
$80.6MYoY · free account
12-mo low · imports
Low · free accountOver the twelve months to August 2026, the U.S. imported $2.1B of Parts for Temperature-Changing Industrial & Laboratory Machinery.
Through August 2026 · exports 10 of 12 months reported. Source: U.S. Census Bureau.