| Business | Phone |
| Advance Screw Products Inc 5160 W Homer St, Chicago 60639 | (773) 237-0034 |
| Alecto Industries Inc 5038 W Armitage Ave, Chicago 60639 | (773) 237-3620 |
| Alward Manufacturing Co 4632 W Lawrence Ave, Chicago 60630 | (773) 286-3334 |
| Bare Metals Inc 3065 N Rockwell St, Chicago 60618 | (708) 681-6212 |
| Bauer & Sons Screw Machine 3945 W Mclean Ave, Chicago 60647 | (773) 772-3881 |
| Belrich Inc 2341 N Lister Ave, Chicago 60614 | (773) 342-2570 |