9001.90.90.00/Diamond Turning Optical Blank/Japan

Diamond Turning Optical Blank from Japan

Precision-ground optical blank of germanium or ZnS prepared for single-point diamond turning into aspheres. HTS 9001.90.90.00 as unmounted optical substrate. Used in prototype IR optics manufacturing.

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%

Calculate with your customs value Verify classification with AI

Import Tips

• Surface roughness (rms <50nm) and figure error specs pre-turning

• Material certificates trace to optical-grade melts

• Prototype status may qualify duty relief programs