| Business | Phone |
| Body Coat 2830 E Washington Blvd, Los Angeles 90023 | (323) 261-2121 |
| Bodycote Inc 2900 S Sunol Dr, Los Angeles 90023 | (323) 264-0111 |
| Certified Steel Treating Corp 2454 E 58th St, Los Angeles 90058 | (323) 583-8711 |
| Coast Heat Treating Co 1767 Industrial Way, Los Angeles 90023 | (323) 263-6944 |
| Scarrott Metallurgical Co 6371 Arizona Cir, Los Angeles 90045 | (310) 645-7300 |
| Tri-J Heat Treating Inc 2431 E 26th St, Los Angeles 90058 | (323) 588-5277 |