8412.90.90.50/Hybrid Rocket Motor Grain Case/Japan

Hybrid Rocket Motor Grain Case from Japan

Filament-wound composite pressure vessel housing solid fuel grain and liquid oxidizer injection system in hybrid rocket motors. Classifies under HTS 8412.90.9050 for hybrid reaction engine parts.

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

• Burst pressure test reports (>1000 psi) and hybrid propellant interface specs confirm classification

• Composite layup diagrams showing oxidizer ports distinguish from solid rocket cases

• Mark as 'propellant tank-engine interface component' in commercial invoice