| Business | Phone |
| Hector Stickar Machining 20263 Paseo Del Prado, Walnut 91789 | (909) 598-2093 |
| Bes Machining Co 3960 Valley Blvd # G, Walnut 91789 | (909) 595-7669 |
| Bomar Machine 765 Pinefalls Ave, Walnut 91789 | (909) 594-0762 |
| C B Enterprises 3990 Valley Blvd # E, Walnut 91789 | (909) 598-8228 |
| Coast Precision Products 3820 Valley Blvd # B, Walnut 91789 | (909) 598-6856 |
| Norman Precise Inc 3960 Valley Blvd # O, Walnut 91789 | (909) 595-1811 |
| Satellite Machine Co Inc 20932 Currier Rd, Walnut 91789 | (909) 598-6242 |