MIL-DTL-13924, Class 1	Alkaline oxidizing process.	   
MIL-DTL-13924, Class 3	Fused salt oxidizing process.	   
MIL-DTL-13924, Class 4	Alkaline oxidizing process.	   
		   
MIL-C-13924, Class 1	Alkaline oxidizing process.	   
MIL-C-13924, Class 3	Fused salt oxidizing process.	   
MIL-C-13924, Class 4	Alkaline oxidizing process.	   
		   
SAE AMS 2485	Coating, Black Oxide	   
		   
MIL-STD-171E Finish No. 3.2      Black oxide for copper alloys, MIL-F-495
	   
MIL-STD-171E Finish No. 3.3.1    Black oxide for iron and steel, MIL-C-13924, 
                                 Class 1, alkaline oxidizing process.
MIL-STD-171E Finish No. 3.3.1.1  Black oxide for iron and steel, MIL-C-13924, 
                                 Class 1, with MIL-C-16173, Grade 3 
                                 supplementary treatment.
MIL-STD-171E Finish No. 3.3.3    Black oxide for corrosion resistant steel alloys,
                                 MIL-C-13924, Class 3, fused salt oxidizing 
                                 process.
MIL-STD-171E Finish No. 3.3.3.1  Black oxide for corrosion resistant steel alloys,
                                 MIL-C-13924, Class 3, with MIL-C-16173,
                                 Grade 3 supplementary oil treatment.
MIL-STD-171E Finish No. 3.3.4    Black oxide for corrosion resistant steel alloys,
                                 MIL-C-13924, Class 4, alkaline oxidizing process.
MIL-F-495                        Chemical black finish for copper alloys.
MIL-HDBK-205                     Phosphate And Black Oxide Coating of Ferrous 
                                 Metals.
Additionally, our black oxide process meets or exceeds the custom specifications of most major U.S. companies. If you have a question about a particular black oxide specification or have a custom specification, please call us and ask.