| Employer |
Industry |
| Komatsu |
Mining trucks |
| Teleweld |
Railroad |
| Union Tank |
Railroad |
| Chicago Transit Authority |
Public transportation |
| A. Finkl Forge |
Forging |
| Charles E. Larson |
Forging |
| Cornell Forge |
Forging |
| C+F Forge (A Division of Chicago Hardware) |
Forging |
| Klein Tools |
Hand tools |
| Turnkey |
Hand tools |
| General American Door |
Garage doors |
| National Metalwares |
Tubular metal products |
| Walker Process |
Environmental (water purification) |
| L.C. |
Metal polishing |
| Thomsen |
Valves |
| Perlick |
Beer taps |
| ITT McDonnell & Miller |
Heat registers |
| Steiner |
Lockers |
| Aramak |
Uniform cleaning |
| Wabash Alloys |
Aluminum |
| Numerous Locals |
Cement |
| Ladish |
Aircraft landing gear |
| Alcan |
Aluminum fleck paint and paint packaging, explosive products |
