| Business | Phone |
| R F Mell Spring & Mfg Co 2815 W Roscoe St, Chicago 60618 | (773) 588-2226 |
| Stanley Spring & Stamping 5050 W Foster Ave, Chicago 60630 | (773) 777-2600 |
| Cap Enterprises Inc 8600 W Bryn Mawr Ave 770n, Chicago 60631 | (630) 628-7850 |
| Wesco Spring Co 4501 S Knox Ave, Chicago 60632 | (773) 838-3350 |
| Sterling Spring Corp 5432 W 54th St, Chicago 60638 | (773) 582-6464 |
| Sterling Spring Corp 5620 W 65th St, Chicago 60638 | (773) 884-3445 |
| White Eagle Spring & Wire Inc 1637 N Lowell Ave, Chicago 60639 | (773) 384-4455 |
| O & G Spring & Wire Forms Spec 4500 W Division St, Chicago 60651 | (773) 772-9331 |
| Paragon Spring Co 4439 W Rice St, Chicago 60651 | (773) 489-6300 |
| United Spring & Mfg Co 830 N Pulaski Rd, Chicago 60651 | (773) 384-8464 |
| K L Industries Inc 3323 W Addison St, Chicago 60618 | (773) 279-7200 |
| Dudek & Bock Spring Mfg 5100 W Roosevelt Rd, Chicago 60644 | (773) 379-4100 |