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Black Flat Washer

When it comes to industrial fastening solutions, the Flat Washer is a fundamental component known for its reliability and versatility. Among the various types available, the black flat washer stands out for its enhanced durability and aesthetic appeal. These washers are widely used in automotive, construction, and machinery applications to distribute the load of a threaded fastener, such as a bolt or nut. The Flat Washer plays a crucial role in preventing damage to surfaces and reducing the risk of loosening under vibration. With the black oxide finish, these washers offer improved corrosion resistance and a sleek, professional look that blends seamlessly into various assemblies. Whether you're working on heavy-duty equipment or precision instruments, incorporating a high-quality Flat Washer ensures long-lasting performance and safety. The black flat washer is particularly favored in environments where both functionality and appearance matter, making it a top choice for engineers and DIY enthusiasts alike.


The Black Flat Washer is engineered to meet rigorous industry standards, featuring precise dimensions and robust materials. Below is a detailed overview of its key parameters, presented in both list and table formats for clarity.

  • Material: Typically made from carbon steel with a black oxide coating for enhanced corrosion resistance.
  • Finish: Black oxide provides a matte black appearance and adds a protective layer against rust.
  • Standards: Complies with ASME B18.22.1 and other international specifications for consistency.
  • Applications: Suitable for automotive assemblies, machinery, plumbing, and general construction projects.
  • Benefits: Distributes load evenly, reduces surface damage, and minimizes fastener loosening.
Parameter Details
Inner Diameter (ID) Ranges from 1/4 inch to 2 inches, depending on size specifications.
Outer Diameter (OD) Typically 1.5 to 3 times the inner diameter for optimal load distribution.
Thickness Varies between 0.5 mm to 5 mm, ensuring compatibility with different fasteners.
Hardness Rockwell hardness of B70 to B100, providing durability under pressure.
Temperature Resistance Operates effectively in temperatures from -20°C to 200°C.
Packaging Available in bulk packs or small quantities, often in plastic bags or boxes.

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