| 601 | Heavy Duty Air Tight Manhole Frames | Company Product |
| 602 | Heavy Duty Applications | Company Product |
| 603 | Heavy Duty Automatic Horizontal Band Saws | Company Product |
| 604 | Heavy Duty Bins | Company Product |
| 605 | Heavy Duty Canvas | Company Product |
| 606 | Heavy Duty Canvas Zippers | Company Product |
| 607 | Heavy Duty Cast Iron Wheels | Company Product |
| 608 | Heavy Duty Cast Nylon Wheels | Company Product |
| 609 | Heavy Duty Casters | Company Product |
| 610 | Heavy Duty Catwalks | Company Product |
| 611 | Heavy Duty Chrome Vanadium Pipe Wrench | Company Product |
| 612 | Heavy Duty Clamp | Company Product |
| 613 | Heavy Duty Coatings | Company Product |
| 614 | Heavy Duty Coin Counters | Company Product |
| 615 | Heavy Duty Control Valves | Company Product |
| 616 | Heavy Duty Conveyer Rollers | Company Product |
| 617 | Heavy Duty Cranes | Company Product |
| 618 | Heavy Duty Cross Braces | Company Product |
| 619 | Heavy Duty Cutter Rings | Company Product |
| 620 | Heavy Duty Cutters | Company Product |
| 621 | Heavy Duty Degreasers | Company Product |
| 622 | Heavy Duty Double Sided Tapes | Company Product |
| 623 | Heavy Duty Electric Stackers | Company Product |
| 624 | Heavy Duty Electrical Conduit | Company Product |
| 625 | Heavy Duty Engine Oil | Company Product |
| 626 | Heavy Duty Epoxy | Company Product |
| 627 | Heavy Duty Epoxy Anchoring | Company Product |
| 628 | Heavy Duty Filters | Company Product |
| 629 | Heavy Duty Floor | Company Product |
| 630 | Heavy Duty Flooring | Company Product |