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8414.90.91.40/Roughing Vacuum Pump Diaphragm Kit/Japan

Roughing Vacuum Pump Diaphragm Kit from Japan

Replacement diaphragm kits for roughing pumps backing high-vacuum systems in semiconductor slicing saws. Falls under HTS 8414.90.91.40 as parts of vacuum pumps for wafer slicing from monocrystalline boules. Provides oil-free rough vacuum to 10^-2 Torr.

Duty Rate — Japan → United States

12.5%

Rate breakdown

9903.05.4912.5%Section 301 (forced labor) — Japan (col1 rate < 12.5 percent): MFN < 12.5% → total duty capped at 12.5%
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Import Tips

• Include wear-part certification and OEM interchangeability docs

• Value as kit vs individual diaphragms affects duty computation