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HSChapter 90
U.S. imports of micrometers, calipers and gauges (HS 901730) totaled $7.6M in June 2026, traded with 46 countries.
Importers of Micrometers, Calipers and Gauges paid $1.7M in duties in June 2026 — an effective duty rate of 22% on $7.4M in dutiable value, based on actual customs collections rather than the published tariff schedule.
Micrometers 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.
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.
Monthly import values over time
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| Country | Imports | Exports | Balance |
|---|---|---|---|
| JAPAN | $2.7M | $289K | -$2.4M |
| CHINA | $2.2M | $335K | -$1.8M |
| CANADA | $207K | $1.4M | +$1.2M |
| MEXICO | $74K | $1.1M | +$1.0M |
| UNITED KINGDOM | $565K | $90K | -$475K |
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 | $4.0M | 24.75% | 100.63% | $996K |
| 9017308000 | GAUGES FOR MEASURING LENGTH | $3.6M | 18.41% | 93.91% | $666K |
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 | $4.6M |
| 9017304000 | MICROMETERS AND CALIPERS | $1.8M |
INSTR & APPL F MEDICAL SURGICAL DENTAL VET, NESOI
HS 901890
MED NEEDLES. NESOI, CATHERERS ETC AND PARTS ETC
HS 901839
ELECTRO-DIAGNOSTIC APPARATUS NESOI, AND PARTS ETC.
HS 901819
OZONE,OXYGEN,ETC THERAPY, RESPIRATION APPARATUS,PT
HS 901920
ARTIFICIAL JOINTS & PARTS & ACCESSORIES THEROF,NES
HS 902139
MEAS CHECKNG INSTRUMENT & MACH, NOT OPTICAL, NESOI
HS 903180
| Port | Imports | Exports | Balance |
|---|---|---|---|
| SEATTLE, WA | $2.0M | -- | -$2.0M |
| CLEVELAND, OH | $676K | $880K | +$204K |
| CHICAGO, IL | $1.0M | $227K | -$806K |