| Business | Phone |
| Hyde Spring & Wire Co 14341 Schaefer Hwy, Detroit 48227 | (313) 272-2201 |
| Michigan Steel Spring Co 12850 Mansfield St, Detroit 48227 | (313) 838-3925 |
| Aaa Ind Spring Svc 18301 Weaver St, Detroit 48228 | (313) 837-7040 |
| Anl Spring Mfg Co 18307 Weaver St, Detroit 48228 | (313) 837-0200 |