50 Silk
| Heading | Description | General |
|---|---|---|
| 5001 | Silkworm cocoons suitable for reeling | Free |
| 5002 | Raw silk (not thrown) | Free |
| 5003 | Silk waste (including cocoons unsuitable for reeling, yarn waste and garnetted stock) | — |
| 5004 | Silk yarn (other than yarn spun from silk waste) not put up for retail sale | Free |
| 5005 | Yarn spun from silk waste, not put up for retail sale | Free |
| 5006 | Silk yarn and yarn spun from silk waste, put up for retail sale; silkworm gut | — |
| 5007 | Woven fabrics of silk or of silk waste | — |
Source: USITC HTS (2026 Basic Edition, frozen to the exam). Rates shown at heading level; duty rates are set on 8/10-digit subheadings. Not legal or classification advice.