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SITCSection 7
U.S. imports of parts for soldering, brazing & welding machinery (nes) and gas surface tempering machines (SITC 73749) totaled $4.8M in July 2026, traded with 36 countries.
Importers of Parts for Soldering, Brazing & Welding Machinery (NES) and Gas Surface Tempering Machines paid $602K in duties in July 2026 — an effective duty rate of 16% on $3.8M in dutiable value, based on actual customs collections rather than the published tariff schedule.
Basic heading 486 of 642 in section 7
Basic heading 73749 · $4.8M of $175.6B
Spare and replacement parts for soldering, brazing, and welding machines not elsewhere specified — as well as parts for gas-operated surface tempering equipment — are consolidated under SITC 73749. These components support MRO operations across metal fabrication, automotive heat-treatment, and industrial maintenance sectors. Classification of parts in this residual heading requires confirming that the parent machine itself falls under the NES or gas-tempering provisions rather than a more specific SITC code; misclassifying parts of a laser welder here instead of under SITC 73739, for example, could trigger a CBP inquiry. Section 301 duty exposure at the HTS level should be verified part by part.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
339 shipments/mo
The classification of a part follows the classification of the machine it is designed for. If the parent machine is classified under an NES or gas-tempering SITC heading, the part belongs in the corresponding parts heading. If the parent machine has its own specific SITC code (e.g., laser welding machines under 73739), the part should follow that specific code's parts provision instead.
Gas surface tempering machines use controlled gas-flame heating to harden or stress-relieve metal surfaces — a process closely related to gas-flame joining and heat-treatment operations. SITC 73749 groups their parts with NES soldering and welding machine parts because all these machines share gas-operated, non-arc metalworking functions, making a combined residual parts heading administratively practical.
Supplier Network
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Imports · July 2026
origin
Taiwan and China together supply 45% of it.
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
$4.8MYoY · Pro
Exports
$2.9MYoY · Pro
12-mo low · imports
YoY · ProThrough July 2026. Source: U.S. Census Bureau.