Black Oxide

Black oxide finish coatings are designed to provide an enhanced visual appeal and an extra layer of corrosion protection for various fasteners, including screws, bolts, and nuts¹. Here are some key points about black oxide fasteners:

1. Visual Appeal and Corrosion Protection:

   • Black oxide provides a visually pleasing surface appearance, making it suitable for applications that require both aesthetics and corrosion resistance.
   • It protects against harmful debris and enhances the overall look of fasteners.

2. Types of Black Oxide Fasteners:

   • Socket Head Cap Screws: These are commonly used with black oxide coating.
   • Spring Pins: Also available with black oxide finish.
   • Bolts, Nuts, and More: Black oxide can be applied to various fastener types, including bolts, nuts, and screws.

3. Materials Treated with Black Oxide:

   • Stainless steel, aluminum, brass, bronze, zinc, and exotic alloys can all receive black oxide treatments.
   • The process replicates the surface finish of the part, with an oil layer applied before the black oxide coating.

4. Advantages of Black Oxide:

   • Minimal change in fastener dimensions.
   • Cost-effective compared to alternatives.
   • Provides mild corrosion and abrasion resistance.
   • Allows paint adherence if needed.