MIL-STD-186F (MI)
TABLE III. Metallic coatings - Continued.
Code No.  | 
Coating  | 
Type  | 
Other Treatment  | 
Thickness, minimum  | 
386 387 388 389 390 391 392 393  | 
Same Zinc coating, hot-dip (ASTM A 153) Aluminum, ion vapor deposited (MIL-DTL- 83488) Same Same Gold plate (ASTM-B-488) SAE AMS 2434 (Plating, Tin- Zinc Alloy) Plating, Zinc- Nickel Alloy  | 
Type IV, Class Fe/Zn 8 Type II, Class 1 Type II, Class 2 Type II, Class 3 Type III, Code C, Class 1.27  | 
Supplementary Chromate Supplementary Chromate (MIL-T-12879) Supplementary Chromate Supplementary Chromate Supplementary Chromate  | 
8 micrometers 0.001 inch 0.0005 inch 0.0003 inch 0.00005 inch  | 
60
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