Silicon-Coated Steel Hairspring from Japan
Steel hairspring with silicon coating for anti-magnetic properties in modern mechanical watches, maintaining traditional spiral form. Classified in HTS 7320.90.1000 as base material is iron/steel wire hairspring, coating considered secondary treatment.
Duty Rate — Japan → United States
50%
Rate breakdown
9903.82.0250%Except as provided for in headings 9903.82.14, 9903.85.67 and 9903.85.68, articles of aluminum, of steel or of copper and derivative aluminum or steel articles, as provided for in subdivisions (c)(i)–(v) of U.S. note 16 to this subchapter
9903.05.900%Articles already subject to Section 232 (steel/aluminum/copper + derivatives, autos + parts, wood, medium/heavy vehicles + parts, semiconductors, patented pharma) — U.S. note 52(f)
Import Tips
• Document coating as <5% total weight to preserve steel classification; heavy coatings risk non-ferrous shift
• Test for magnetic permeability to distinguish from pure silicon hairsprings under Chapter 71
• Use material safety data sheets (MSDS) for coated products to address any hazmat concerns