| Business | Phone |
| Monte's Screw Machine Co 9650 Topanga Canyon Pl # E, Chatsworth 91311 | (818) 882-6251 |
| Papco Screw Products Inc 9410 De Soto Ave # A, Chatsworth 91311 | (818) 341-2266 |
| Torrance Manufacturing 9540 Owensmouth Ave, Chatsworth 91311 | (818) 709-7838 |