| 511 | Diagnostic Reagents | Company Product |
| 512 | Diagnostic Tools | Company Product |
| 513 | Diagonal Brace | Company Product |
| 514 | Diagonal Packings | Company Product |
| 515 | Diagonal Pliers | Company Product |
| 516 | Dial Comparators | Company Product |
| 517 | Dial Gauges | Company Product |
| 518 | Dial Indicators | Company Product |
| 519 | Dial Protractors | Company Product |
| 520 | Dial Thermometers | Company Product |
| 521 | Dialog Controllers | Company Product |
| 522 | Diamond Abrasives | Company Product |
| 523 | Diamond Abrasives Wheel | Company Product |
| 524 | Diamond Blades | Company Product |
| 525 | Diamond Coated Saw Blade | Company Product |
| 526 | Diamond Coated Saw Blades | Company Product |
| 527 | Diamond Consumables | Company Product |
| 528 | Diamond Cord Drills | Company Product |
| 529 | Diamond Core Bit | Company Product |
| 530 | Diamond Core Bits | Company Product |
| 531 | Diamond Core Drill Machines | Company Product |
| 532 | Diamond Core Drilling Machines | Company Product |
| 533 | Diamond Coring Machine | Company Product |
| 534 | Diamond Cup Wheel | Company Product |
| 535 | Diamond Cut Coconut | Company Product |
| 536 | Diamond Cutteer Accessories | Company Product |
| 537 | Diamond Cutter Accessories | Company Product |
| 538 | Diamond Cutting Tools | Company Product |
| 539 | Diamond Dressers | Company Product |
| 540 | Diamond Drill Bits | Company Product |