| Business | Phone |
| Wayland Engineering 5 Forms Way, Middleton 1949 | (978) 750-9908 |
| Burgess Machine 15 Bixby Ave, Middleton 1949 | (978) 774-6240 |
| D J Machine Co 23 Bixby Ave, Middleton 1949 | (978) 762-3131 |
| Everett Pattern & Mfg Inc 194 S Main St, Middleton 1949 | (978) 777-4575 |
| G B Engineering 17 Bixby Ave, Middleton 1949 | (978) 774-3122 |
| Gtg Inc 3 Birch Rd, Middleton 1949 | (978) 777-5010 |
| Halco Machine 21 Bixby Ave, Middleton 1949 | (978) 646-9520 |
| Marshall Engineering 29 Bixby Ave, Middleton 1949 | (978) 777-7255 |
| Lanphear Engineering 6 Kimber Ave, Middleton 1949 | (978) 768-4567 |