| 8540.71.20 | 00 | Modified for use as parts of microwave ovens | No. | Free | | 35% |
| 8540.71.40 | 00 | Other | No. | 3.7% | Free (A+,AU,BH, CA,CL,D,E,IL,J, JO,MA,MX,P, SG) | 35% |
| 8540.72.00 | 00 | Klystrons | No. | 3.3% | Free (A+,AU,BH, CA,CL,D,E,IL,J, JO,MA,MX,P, SG) | 35% |
| 8540.79.00 | 00 | Other | No. | 3.7% | Free (A+,AU,BH, CA,CL,D,E,IL,J, JO,MA,MX,P, SG) | 35% |
| 8540.81.00 | 00 | Other tubes: | | | | |
| 8540.81.00 | 00 | Receiver or amplifier tubes | No. | 4.2% | Free (A+,AU,B,BH, CA,CL,D,E,IL,J, JO,MA,MX,P, SG) | 35% |
| 8540.89.00 | | Other | | 3.7% | Free (A+,AU,B,BH, CA,CL,D,E,IL,J, JO,MA,MX,P, SG) | 35% |
| 8540.89.00 | 20 | Gas and vapor electron tubes | No. | | | |
| 8540.89.00 | 40 | Diodes, triodes and tetrodes | No. | | | |
| 8540.89.00 | 60 | Light-sensing tubes | No. | | | |
| 8540.89.00 | 80 | Other | No. | | | |
| 8540.91 | | Parts: | | | | |
| 8540.91 | | Of cathode-ray tubes: | | | | |
| 8540.91.15 | 00 | Front panel assemblies | X | 5.4% | Free (A+,AU,B,CA, CL,D,E,IL,J,JO, MX,P,SG) 3.7% (BH) 3.5% (MA) | 35% |
| 8540.91.20 | 00 | Deflection coils | X | Free | | 35% |
| 8540.91.50 | 00 | Other | X | 5.4% | Free (A+,AU,B,BH, CA,CL,D,E,IL,J, JO,MA,MX,P,SG) | 35% |
| 8540.99 | | Other: | | | | |
| 8540.99.40 | 00 | Electron guns; radio frequency (RF) interaction structures for microwave tubes of subheadings 8540.71 through 8540.79, inclusive | X | Free | | 35% |
| 8540.99.80 | 00 | Other | X | Free | | 35% |
Harmonized Tariff Schedule of the United States inquiry: 3203Ã
