DIN6340 Washer/Hardened Steel Washer, M6-M30, Black Oxide

Standard:DIN6340

Description:

      If you are referring to hardened steel washers in the size range of M6 to M30 with a black oxide finish, here is some general information:

      1.Material: Hardened steel washers are made from steel that has undergone a hardening process to increase its strength and durability.

      2.Black Oxide Finish: The black oxide coating is a conversion coating applied to the surface of the washer. It provides several benefits, including improved corrosion resistance, increased lubricity, and an aesthetically pleasing black appearance.

•         Corrosion Resistance: The black oxide finish enhances the washer's resistance to corrosion, protecting it from rust and other forms of oxidation. However, it is not as corrosion-resistant as some other coatings, such as hot-dip galvanizing or Dacromet.

•         Lubricity: The black oxide coating reduces friction between the washer and the mating surface, making installation easier and reducing the risk of galling or seizing during tightening.

•         Aesthetics: The black oxide finish gives the washers a visually appealing black appearance, which can be desirable in certain applications.

      Washers with a black oxide finish are commonly used in various industries, including automotive, machinery, and general manufacturing. They provide moderate corrosion resistance and are suitable for indoor or low-corrosion environments.

      However, it's important to note that the specific DIN standard for washers should be confirmed to ensure the accuracy of the information and to comply with the appropriate standards for your application.

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