| Business | Phone |
| Atlas Manufacturing Ltd 3 Lincoln St, Harvard 60033 | (815) 943-1400 |
| Brown Street Industries 702 W Brown St, Harvard 60033 | (815) 943-4867 |
| St Charles Screw Products Inc 404 E Park St, Harvard 60033 | (815) 943-8060 |
| Mitts & Merrill 615 Chippewa Rd, Harvard 60033 | (815) 943-3303 |