| HTS Number | Description | Unit of Quantity | General Rate of Duty | Details | 
| 8431 43 | Parts for boring or sinking machinery of subheading 8430.41 or 8430.49: |  |  |  | 
| 8431 4340.00 | Of offshore oil and natural gas drilling and production platforms | No. | Free | More | 
| 8431 4380 | Other |  | Free |  | 
| 8431 4380.20 | Tool joints, whether or not forged | No. |  | More | 
| 8431 4380.40 | Drill pipe fitted with tool joints | No. |  | More | 
| 8431 4380.60 | Other | No. |  | More | 
| 8431 4380.90 | Of other boring or sinking machinery | No. |  | More | 
| 8431 49 | Other: |  |  |  | 
| 8431 4910 | Of machinery of heading 8426 |  | Free |  | 
| 8431 4910.10 | Of machinery of subheadings 8426.11, 8426.19 and 8426.30 | No. |  | More | 
| 8431 4910.60 | Of mobile lifting frames, straddle carriers and works trucks fitted with a crane | No. |  | More | 
| 8431 4910.90 | Other | No. |  | More | 
| 8431 4990 | Other |  | Free |  | 
| 8431 4990.05 | Backhoe attachments | No. |  | More | 
| 8431 4990.10 | Front-end loader attachments | No. |  | More | 
| 8431 4990.15 | Rippers and rooters | No. |  | More | 
| 8431 4990.20 | Other | No. |  | More | 
| 8431 4990.25 | Cast axle housings | No. |  | More | 
| 8431 4990.30 | Other | No. |  | More | 
| 8431 4990.35 | Cast axle housings | No. |  | More |