| Business | Phone |
| Cash Co 3606 Crescent Rdg, Dubuque 52003 | (563) 582-1719 |
| Dubuque Screw Products Inc 460 Huff St, Dubuque 52003 | (563) 583-2770 |
| Foster Engineering 5255 Pennsylvania Ave, Dubuque 52002 | (563) 584-9200 |
| Grove Tool Inc 3230 Dodge St, Dubuque 52003 | (563) 588-0536 |
| Hermsen Machine 2400 Kerper Blvd D130, Dubuque 52001 | (563) 588-2855 |
| Key City Iron Works 898 Jackson St, Dubuque 52001 | (563) 582-5689 |
| Tri-State Industries 1340 Synergy Ct, Dubuque 52002 | (563) 588-0535 |