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HSChapter 85
U.S. imports of insulating fittings of ceramics for electrical machines (HS 854710) totaled $7.1M in April 2026, traded with 27 countries.
Importers of Insulating Fittings of Ceramics for Electrical Machines paid $1.8M in duties in April 2026 — an effective duty rate of 27% on $6.6M in dutiable value, based on actual customs collections rather than the published tariff schedule.
Last updated: April 2026 dataCeramic insulating fittings for electrical machines and appliances — including spark plug bodies and other precision ceramic components — serve critical dielectric and thermal functions in automotive ignition systems, industrial equipment, and high-frequency apparatus. The US schedule distinguishes fittings for spark-producing machines (8547104000), which captures automotive and small-engine ignition applications, from all other ceramic insulating fittings (8547108000). China is the leading import source, with Germany and Japan also prominent — the latter two reflecting OEM-grade ceramic precision manufacturing for automotive and industrial clients. Imports from China are subject to Section 301 tariffs.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
A ceramic insulator body imported as a standalone component for use in spark plug assembly would typically fall under 8547104000, which covers insulating fittings for machines that produce sparks. If the complete assembled spark plug is imported instead, it would be classified under a different heading (8511) as an ignition part. The distinction between a component fitting and a finished part is critical and should be confirmed with a licensed customs broker.
Heading 854620 covers standalone electrical insulators — products whose primary function is to insulate conductors on power lines or in switchgear. Heading 854710 covers fittings that are integral parts of electrical machines or appliances, providing insulation within the machine's structure. The functional context (infrastructure insulation versus machine component) and the product's design for a specific machine application are the key distinguishing factors.
| Country | Imports | Exports | Balance |
|---|---|---|---|
| KOREA, SOUTH | $172K | $20.9M | +$20.7M |
| MEXICO | $252K | $4.0M | +$3.8M |
| CHINA | $3.8M | $109K | -$3.7M |
| GERMANY | $1.2M | $64K | -$1.1M |
| JAPAN | $1.0M | $86K | -$954K |
Monthly import values over time
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HS10 import codes under this HS6 parent. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Import Value | Effective Tariff % | Duty Collected |
|---|---|---|---|---|
| 8547108000 | CERAMICINSULATING FITTINGS FOR MACHINES, NESOI | $6.8M | 27.53% | $1.7M |
| 8547104000 | INSULATING FITTINGS FOR MACHINES PRODUCNG SPARK PG | $277K | 15.04% | $42K |
CERAMICINSULATING FITTINGS FOR MACHINES, NESOI
INSULATING FITTINGS FOR MACHINES PRODUCNG SPARK PG
HS10 export codes under this HS6 parent. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 8547100000 | INSULATING FITTINGS OF CERAMICS FOR ELECTRICAL MCH | $26.9M |
INSULATING FITTINGS OF CERAMICS FOR ELECTRICAL MCH
344.1K no
MACH FOR RECP/CONVR/TRANS/REGN OF VOICE/IMAGE/DATA
HS 851762
SOLID-STATE NON-VOL SEMICONDUCTOR STORAGE DEVICES
HS 852351
SMARTPHONES
HS 851713
PROCESSORS AND CONTROLLERS, ELECTRONIC INTEG CIRCT
HS 854231
CONTROLS ETC W ELECT APPR F ELECT CONT NOV 1000 V
HS 853710
STATIC CONVERTERS; ADP POWER SUPPLIES
HS 850440
| State | Imports | Exports | Balance |
|---|---|---|---|
| California | $1.9M | $21.6M | +$19.7M |
| Texas | $793K | $2.9M | +$2.1M |
| Tennessee | $799K | $371K | -$428K |
| Port | Imports | Exports | Balance |
|---|---|---|---|
| ANCHORAGE, AK | $173K | $11.1M | +$11.0M |
| NEW ORLEANS, LA | $736K | $9.6M | +$8.9M |
| YSLETA, TX | -- | $2.7M | +$2.7M |