Crystal Puller Seed Holder Chuck from Germany
Graphite or quartz seed crystal holder with rotation mechanism for initiating boule growth in Czochralski pullers. Essential part for crystal grower machinery under heading 8430. 8431.49.90.
Duty Rate — Germany → United States
15%
Rate breakdown
9903.82.2215%Derivative steel articles the product of Argentina, Ecuador, El Salvador, Guatemala, Japan, the Republic of Korea, Liechtenstein, Switzerland, Taiwan, the United Kingdom, or a member nation of the European Union, as provided for in subdivision (c)(xi) 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
• Material purity specs (99.999%+) and temperature rating (>1400°C) required
• Pitfall: graphite articles under 6815 if not machinery part
• Thermal shock test data helpful