# HTS 8409: Parts suitable for use solely or principally with the engines of heading 8407 or 8408:

https://geopax.app/tariffs/catalog/84/8409

Source: [2026 HTS Revision 21 (October 9, 2026)](https://hts.usitc.gov/search?query=8409). Additional duties by country of origin may apply; estimate a shipment's full duty with the tariff calculator: https://geopax.app/tariffs/calculator

## 8409: Parts suitable for use solely or principally with the engines of heading 8407 or 8408:

| Code | Description | General | Special | Column 2 | Units |
| --- | --- | --- | --- | --- | --- |
| 8409 | Parts suitable for use solely or principally with the engines of heading 8407 or 8408: |  |  |  |  |
| 8409.10.00 |   For aircraft engines | Free |  | 35% |  |
| 8409.10.00.40 |     For use in civil aircraft | Free |  | 35% | kg |
| 8409.10.00.80 |     Other | Free |  | 35% | kg |
|  |   Other: |  |  |  |  |
| 8409.91 |     Suitable for use solely or principally with spark-ignition internal combustion piston engines (including rotary engines): |  |  |  |  |
| 8409.91.10 |       Cast-iron parts, not advanced beyond cleaning, and machined only for the removal of fins, gates, sprues and risers or to permit location in finishing machinery | Free |  | 10% |  |
| 8409.91.10.40 |         For vehicles of subheading 8701.21, 8701.22, 8701.23, 8701.24 or 8701.29, or heading 8702, 8703 or 8704 | Free |  | 10% | kg |
| 8409.91.10.60 |         For marine propulsion engines | Free |  | 10% | kg |
| 8409.91.10.80 |         Other | Free |  | 10% | kg |
|  |       Other: |  |  |  |  |
|  |         To be installed in vehicles of subheading 8701.21, 8701.22, 8701.23, 8701.24 or 8701.29, or heading 8702, 8703 or 8704: |  |  |  |  |
| 8409.91.30.00 |           Aluminum cylinder heads | 2.5% | Free (A,AU,B,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) | 35% | No., kg |
| 8409.91.50 |           Other | 2.5% | Free (A*,AU,B,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) | 35% |  |
| 8409.91.50.10 |           Connecting rods | 2.5% | Free (A*,AU,B,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) | 35% | No., kg |
| 8409.91.50.81 |           Steel forgings | 2.5% | Free (A*,AU,B,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) | 35% | kg |
| 8409.91.50.85 |           Other | 2.5% | Free (A*,AU,B,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) | 35% | kg, No. |
| 8409.91.92 |         For marine propulsion engines | 2.5% | Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) | 35% |  |
| 8409.91.92.10 |           Connecting rods | 2.5% | Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) | 35% | No., kg |
| 8409.91.92.90 |           Other | 2.5% | Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) | 35% | kg |
| 8409.91.99 |         Other | 2.5% | Free (A*,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) | 35% |  |
| 8409.91.99.10 |           Connecting rods | 2.5% | Free (A*,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) | 35% | No., kg |
| 8409.91.99.90 |           Other | 2.5% | Free (A*,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) | 35% | kg |
| 8409.99 |     Other: |  |  |  |  |
| 8409.99.10 |       Cast-iron parts, not advanced beyond cleaning, and machined only for the removal of fins, gates, sprues and risers or to permit location in finishing machinery | Free |  | 10% |  |
| 8409.99.10.40 |         For vehicles of subheading 8701.21, 8701.22, 8701.23, 8701.24 or 8701.29, or heading 8702, 8703 or 8704 | Free |  | 10% | kg |
| 8409.99.10.60 |         For marine propulsion engines | Free |  | 10% | kg |
| 8409.99.10.80 |         Other | Free |  | 10% | kg |
|  |       Other: |  |  |  |  |
| 8409.99.91 |         To be installed in vehicles of subheading 8701.21, 8701.22, 8701.23, 8701.24 or 8701.29, or heading 8702, 8703 or 8704 | 2.5% | Free (A*,AU,B,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) | 35% |  |
| 8409.99.91.10 |           Connecting rods | 2.5% | Free (A*,AU,B,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) | 35% | No., kg |
| 8409.99.91.90 |           Other | 2.5% | Free (A*,AU,B,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) | 35% | kg, No. |
| 8409.99.92 |         For marine propulsion engines | 2.5% | Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) | 35% |  |
| 8409.99.92.10 |           Connecting rods | 2.5% | Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) | 35% | No., kg |
| 8409.99.92.90 |           Other | 2.5% | Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) | 35% | kg |
| 8409.99.99 |         Other | Free |  | 35% |  |
| 8409.99.99.10 |           Connecting rods | Free |  | 35% | No., kg |
| 8409.99.99.90 |           Other | Free |  | 35% | kg |