U.S. imports of Thread Rolling Machines (SITC 73393) totaled $2.4M in August 2026, imported from 11 countries.
Importers of Thread Rolling Machines paid $144K in duties in August 2026, an average duty rate of 5.90% — duty actually collected as a share of the imports that cleared customs, not the published tariff schedule. Thread Rolling Machines imports of $2.4M in August 2026 ran 125% above the year-to-date monthly average of $1.1M.
Last updated: August 2026 dataThread rolling machines form screw threads by cold-plastic deformation rather than cutting, producing stronger, smoother threads with superior fatigue resistance — a key reason they dominate high-volume fastener and aerospace bolt manufacturing. The cold-forming process work-hardens the thread flanks, which is a specification requirement in many aerospace and automotive fastener standards. Importers should distinguish flat-die, cylindrical-die, and planetary-die configurations, as these represent different machine architectures that may affect HTS classification at the 10-digit level.
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18 import shipments a month
Rolling displaces metal rather than removing it, aligning the grain structure along the thread profile and work-hardening the surface. The result is a thread with higher tensile and fatigue strength than a cut thread of the same nominal size — a critical advantage for aerospace, automotive, and structural fasteners subject to dynamic loading.
At the SITC level, all thread rolling machines for metal fall under 73393 regardless of die type. At the HTS 10-digit level, the applicable tariff schedule may distinguish by machine type or capacity, so importers should review the specific subheading with a licensed customs broker to confirm the correct classification for their machine's configuration.
Basic heading 73393 · $2.4M of $172.0B
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Imports · August 2026
origin
Germany and Taiwan together supply 64% of it. Israel pays 12.5% duty; Germany <0.1%.
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
$2.4MYoY · free account
Exports
$222KYoY · free account
12-mo low · imports
Low · free accountOver the twelve months to August 2026, the U.S. imported $15.5M of Thread Rolling Machines.
Through August 2026 · exports 10 of 12 months reported. Source: U.S. Census Bureau.