Synthetic Diamond Honing Stone from Japan
Segmented stones of agglomerated synthetic diamond for internal honing of cylinders and bores in engine manufacturing. HTS 6804.21.00 covers these hand-sharpening/polishing stones and similar abrasives. Provides consistent surface finishes for automotive and aerospace parts.
Duty Rate — Japan → United States
12.5%
Rate breakdown
9903.05.4912.5%Except for products described in headings 9903.05.85–9903.05.92, articles the product of Japan, with an ad valorem (or ad valorem equivalent) rate of duty under column 1 less than 12.5 percent, as provided for in U.S. note 52 to this subchapter
Import Tips
• Specify grit progression (coarse/medium/fine) and mandrel compatibility in invoices for accurate duty assessment
• Ensure no metal framework inclusion; loose stones classify here vs. complete tools