| Business | Phone |
| Accurate Manufacturing Co 1073 Shary Cir # A, Concord 94518 | (925) 674-9657 |
| Dinucci's Corp 1001 Shary Cir # 9, Concord 94518 | (925) 798-3946 |
| East Bay Machine & Tool 1030 Shary Ct, Concord 94518 | (925) 689-2421 |
| Alpha Omega Assembly & Machine 1037 Shary Cir # E, Concord 94518 | (925) 609-7319 |
| Brett Machining 3241 Monument Way # L, Concord 94518 | (925) 609-7998 |
| Concord Machine Works Inc Concord 94520 | (925) 687-9066 |
| Elliott Co 1654 Elm Rd, Concord 94519 | (925) 689-5098 |
| Fun Factory Manufacturer 1836 Arnold Industrial Pl # 1, Concord 94520 | (925) 825-4223 |
| Jkc Manufacturer 1990 Olivera Rd # D, Concord 94520 | (925) 691-8800 |
| Molenda Machining 1717 Solano Way # 21, Concord 94520 | (925) 682-5110 |
| Rankin Performance Machine 1700 East St, Concord 94520 | (925) 685-8112 |
| Renaissance Precision Manufacturer 1990 Olivera Rd # E, Concord 94520 | (925) 691-5997 |
| Silva Manufacturing Svc 1015 Shary Cir, Concord 94518 | (925) 685-3787 |
| Stellar Machine Inc 970 Detroit Ave, Concord 94518 | (925) 687-8884 |
| Tomco Engineering 1717 Solano Way, Concord 94520 | (925) 405-0100 |
| Tosca Precision Machining 3241 Monument Way # L, Concord 94518 | (925) 798-4471 |