| Business | Phone |
| Avd Metal Fab 28233 Industrial Blvd, Hayward 94545 | (510) 785-4011 |
| Labtronix 3200 Investment Blvd, Hayward 94545 | (510) 786-3200 |
| Metal Stamping Specialties 28065 Quercus Ct, Hayward 94542 | (510) 887-7377 |
| United Mechanical Metal Fab 548 Claire St, Hayward 94541 | (510) 537-4744 |