| 541 | Diamond Grinding Wheels | Company Product |
| 542 | Diamond Guide | Company Product |
| 543 | Diamond Honing Sticks | Company Product |
| 544 | Diamond Jewellers | Company Product |
| 545 | Diamond Lapping Tools | Company Product |
| 546 | Diamond Metal Bond | Company Product |
| 547 | Diamond Pastes | Company Product |
| 548 | Diamond Powder | Company Product |
| 549 | Diamond Resin Bond | Company Product |
| 550 | Diamond Saw Blade | Company Product |
| 551 | Diamond Saw Blades | Company Product |
| 552 | Diamond Sawblades | Company Product |
| 553 | Diamond Tool Manufacturing Machines | Company Product |
| 554 | Diamond Tools | Company Product |
| 555 | Diamond Turning Tools | Company Product |
| 556 | Diamond Vetrified Bond | Company Product |
| 557 | Diamond Wheel Cutters | Company Product |
| 558 | Diamond Wheels | Company Product |
| 559 | Diamond Wire Dies Guide | Company Product |
| 560 | Diamonds | Company Product |
| 561 | Diaper Service | Company Product |
| 562 | Diaphragm | Company Product |
| 563 | Diaphragm Actuated Control Valves | Company Product |
| 564 | Diaphragm Aerators | Company Product |
| 565 | Diaphragm Control Valves Overhaul | Company Product |
| 566 | Diaphragm Control Valves Reconditioning | Company Product |
| 567 | Diaphragm Control Valves Repair | Company Product |
| 568 | Diaphragm Epdm | Company Product |
| 569 | Diaphragm For Wilden Pumps | Company Product |
| 570 | Diaphragm Packings | Company Product |