| AMS 2759/6 | Gas Nitriding and Heat Treatment of Low-Alloy Steel Parts | Heat Treat |
| Supercedes: AMS-S-6090 | Superceded By: None |
| Number | Name | State | Country |
| 90049129 | Bodycote Thermal Processing - Huntington Park | CA | United States |
| 90043420 | BURBANK STEEL TREATING INC | CA | United States |