| 541 | Heat Recovery Systems | Company Product |
| 542 | Heat Reduction Paints | Company Product |
| 543 | Heat Resistance Alloy | Company Product |
| 544 | Heat Resistance Cables | Company Product |
| 545 | Heat Resistance Sheets | Company Product |
| 546 | Heat Resistance Sponges | Company Product |
| 547 | Heat Resistance Tape | Company Product |
| 548 | Heat Resistance Tubes | Company Product |
| 549 | Heat Resistant Cables | Company Product |
| 550 | Heat Resistant Castings | Company Product |
| 551 | Heat Resistant Coatings | Company Product |
| 552 | Heat Resistant Finishes | Company Product |
| 553 | Heat Resistant Glass | Company Product |
| 554 | Heat Resistant Paints | Company Product |
| 555 | Heat Resistant Sight Glass | Company Product |
| 556 | Heat Resistant Silicone Sheets | Company Product |
| 557 | Heat Sealing Machines | Company Product |
| 558 | Heat Shrink Tubing | Company Product |
| 559 | Heat Shrinkable Sleeving & Tubings | Company Product |
| 560 | Heat Sink Products | Company Product |
| 561 | Heat Sinks | Company Product |
| 562 | Heat Tracing Cables | Company Product |
| 563 | Heat Transfer Agents | Company Product |
| 564 | Heat Transfer Fluid | Company Product |
| 565 | Heat Transfer Foil | Company Product |
| 566 | Heat Treatment Equipment | Company Product |
| 567 | Heat Treatment Furnaces | Company Product |
| 568 | Heat Treatment Ovens | Company Product |
| 569 | Heat-Proof Bellows | Company Product |
| 570 | Heatax | Company Product |