| Business | Phone |
| A & R Jadczak Co 135 Green St, Langhorne 19047 | (215) 752-3438 |
| Arc Manufacturing Co 1651 Loretta Ave, Langhorne 19053 | (215) 355-8500 |
| Arch Speciaties Co 204 Sterner Mill Rd, Langhorne 19053 | (215) 357-4892 |
| Artcraft Machine & Tool Corp 1115 W Gillam Ave, Langhorne 19047 | (215) 757-7753 |
| Beaver Tool & Machine Co 1641 Loretta Ave, Langhorne 19053 | (215) 322-0660 |
| D & R Machine Co 2310 Big Oak Rd, Langhorne 19047 | (215) 750-7272 |
| Victoria Precision 410 Clearview Ave # C, Langhorne 19053 | (215) 355-7576 |
| Tiros Machine & Tool Co 285 Andrews Rd, Langhorne 19053 | (215) 322-9965 |
| Jackson & Heit Machine Co Inc 740 Libby Ln, Langhorne 19053 | (215) 757-2205 |
| Lima Precision Manufacturer Co 1640 Loretta Ave, Langhorne 19053 | (215) 355-1680 |
| Nemco 900 Pennsylvania Blvd, Langhorne 19053 | (215) 355-2100 |