U.S. imports of micrometers, calipers and gauges (HS 901730) totaled $8.4M in August 2026, imported from 51 countries.
Importers of Micrometers, Calipers and Gauges paid $1.6M in duties in August 2026, an effective tariff rate of 19.26% of the $8.4M imported — duty actually collected as a share of that value, not the published tariff schedule. Micrometers, Calipers and Gauges imports of $8.4M in August 2026 ran 10% above the year-to-date monthly average of $7.6M.
Last updated: August 2026 dataMicrometers and calipers — the dimensional measurement workhorses of precision manufacturing — are classified alongside length gauges under this heading, with the US schedule separating micrometers and calipers (9017304000) from gauges for measuring length (9017308000). Japan is the leading import source, reflecting the global reputation of Japanese metrology brands in the machining and quality-assurance sectors. Goods from China are subject to Section 301 tariffs, a factor that has reinforced Japan's position as the preferred source for high-precision instruments where measurement uncertainty requirements are stringent. Importers should confirm that digital calipers with integrated data-output ports are classified here rather than under electronic measuring instrument headings.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
473 shipments/mo
Digital calipers with data-output capability are generally still classified under 9017304000 as calipers, because the data-output feature is ancillary to the instrument's primary function of measuring length by direct contact. The essential character remains that of a caliper. However, if a device is marketed and designed primarily as a data-acquisition system that incidentally measures, a different classification may apply. CBP binding rulings on specific models are the most reliable way to confirm classification.
Micrometers and calipers are hand-held instruments that measure a workpiece by direct contact between two measuring faces or jaws. Gauges for measuring length — such as dial indicators, bore gauges, or plug gauges — typically measure by comparing a workpiece dimension against a fixed reference or by detecting deviation from a nominal value. The distinction matters because the two lines may carry different duty rates, and misclassification between them is a common audit finding in the precision tools sector.
HSChapter 90
Subheading 2 of 5 in heading 9017
Subheading 901730 · $8.4M of $34.1M
ImportsExports
Imports
$8.4MYoY · free account
Exports
$6.5MYoY · free account
12-mo low · imports
YoY · free accountOver the twelve months to August 2026, the U.S. imported $93.3M of Micrometers, Calipers and Gauges.
Through August 2026. Source: U.S. Census Bureau.
HS10 import codes under this HS6 parent, each with its own page. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Import Value | Effective Tariff % | Dutiable Share | Duty Collected |
|---|---|---|---|---|---|
| 9017304000 | Micrometers and Calipers | $4.6M | 21.44% | 99.67% | $987K |
| 9017308000 | Gauges for Measuring Length | $3.8M | 16.58% | 94.58% | $624K |
HS10 export codes under this HS6 parent, each with its own page. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 9017308000 | Gauges for Measuring Length | $5.2M |
| 9017304000 | Micrometers and Calipers | $1.3M |
Import lines come from the U.S. Harmonized Tariff Schedule and export lines from Schedule B. The two are numbered by different agencies, so the same 10-digit code can appear in both tables describing a different product.
Trade Directory
List your company under HS 901730 — Micrometers, Calipers and Gauges, so the companies trading it can find you. Be the first supplier listed.
Imports · August 2026
origin
Japan and China together supply 69% of it. China pays 41.0% duty; Germany 9.1%.
customs district
destination
entry
rate provision · imports
2.9% enters free of duty; duty collected equals 19.26% of total import value.