| Business | Phone |
| Warren Screw Products 23600 Schoenherr Rd, Warren 48089 | (586) 447-2750 |
| D & J Manufacturer 24201 Hoover Rd, Warren 48089 | (586) 756-9311 |
| Darling Bolt Co 2941 E 10 Mile Rd, Warren 48091 | (586) 757-4100 |
| Fordsell Machine Product Co 30400 Ryan Rd, Warren 48092 | (586) 751-4700 |
| Nassau Mach Product Co 23600 Schoenherr Rd, Warren 48089 | (586) 777-4100 |