| Business | Phone |
| Walter Machine & Screw Co 3104 Woodbridge St, Detroit 48207 | (313) 259-3370 |
| Automatic Tooling Corp 521 Saint Jean St, Detroit 48214 | (313) 822-9250 |
| Quick Machine Co 20713 Glendale St, Detroit 48223 | (313) 535-3020 |
| Beck Precision Detroit 48226 | (313) 963-5250 |
| Kedsell Co 14307 Schaefer Hwy, Detroit 48227 | (313) 272-2590 |
| A B Heller Screw Products Inc 6425 E Hildale St, Detroit 48234 | (313) 892-0800 |
| Central Screw Products Co 6425 E Hildale St, Detroit 48234 | (313) 893-9100 |
| Oakland Bolt & Nut Llc 8799 Lyndon St, Detroit 48238 | (313) 659-1677 |