This SAE Aerospace Standard (AS) covers requirements for nickel-chromium coatings@ black oxide or black phosphate coatings@ and alternative coatings for aerospace hand tools. Classification Coatings covered by this document shall be of the following types@ as specified: Type I - Nickel-Chromium Coating Type II - Black Oxide@ Black Phosphate Coating@ or Other Black Finish Coatings Type III - Alternative Coatings