| Business | Phone |
| Ewd H Wolk Inc 606 E Brook Dr, Arlington Heights 60005 | (847) 357-8080 |
| Donlon Engineering Co 125 Elizabeth Dr, Arlington Heights 60005 | (847) 437-7360 |
| Stanley's Technical Corp 3355 N Ridge Ave, Arlington Heights 60004 | (847) 255-6800 |
| Triton Electronics Inc 2315 N Kennicott Dr, Arlington Heights 60004 | (847) 934-6426 |
| Jet Grinding & Mfg Inc 2309 E Oakton St, Arlington Heights 60005 | (847) 956-8646 |
| Rolek Industries Inc 2456 E Oakton St, Arlington Heights 60005 | (847) 364-4140 |