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SITCSection 8
U.S. imports of parts and accessories for materials testing machines and appliances (SITC 87454) totaled $7.0M in April 2026, traded with 44 countries.
Importers of Parts and Accessories for Materials Testing Machines and Appliances paid $640K in duties in April 2026 — an effective duty rate of 11% on $6.0M in dutiable value, based on actual customs collections rather than the published tariff schedule. Parts and Accessories for Materials Testing Machines and Appliances imports of $7.0M in April 2026 ran 18% above the year-to-date monthly average of $5.9M.
Last updated: April 2026 dataReplacement grips, load cells, extensometers, indenter tips, and other components dedicated to materials testing equipment are classified here as parts and accessories, provided they are identifiable as suitable for use solely or principally with the testing machines of the parent heading. The principal-use determination is central: generic mechanical or electronic components that could serve multiple equipment types may be classified under their own specific headings rather than as parts of testing machines. Importers maintaining service inventories for testing labs should document the dedicated end-use of each component to support classification.
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When a component is not exclusively dedicated to materials testing machines, classification depends on principal use — the use to which the article is chiefly put. If the load cell is designed and marketed primarily for testing machines, it may qualify here; if it is a general-purpose transducer, it is more likely classified under the heading for its own function. Supporting documentation such as product datasheets and sales records helps establish principal use.
Calibration weights and reference standards are generally classified under their own headings for weights rather than as accessories to testing machines, even when sold as part of a calibration kit. The classification of the kit as a whole depends on which component gives it its essential character.
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Monthly import values over time