SAE flat washers, often referred to simply as flat washers, are a type of washer that conforms to the standards set by the Society of Automotive Engineers (SAE). These washers are flat, thin, and generally circular in shape, with a central hole. The primary purpose of SAE flat washers is to distribute the load of a threaded fastener, such as a bolt or nut, over a larger surface area. Here are some key features and aspects of SAE flat washers:

1. Standardization: SAE flat washers adhere to specific SAE standards, ensuring consistency in dimensions, materials, and performance characteristics. This standardization facilitates compatibility with other SAE-compliant fasteners and components.
2. Materials: SAE flat washers are available in various materials, including carbon steel, stainless steel, and other alloys. The choice of material depends on factors such as the application’s requirements, environmental conditions, and corrosion resistance.
3. Dimensions: SAE flat washers come in a range of sizes, with standardized inner and outer diameters. The dimensions are designed to match specific bolt and nut sizes, providing a uniform and reliable interface in various automotive and engineering applications.
4. Function: The main function of flat washers is to prevent surface damage, distribute loads evenly, and reduce the risk of loosening in fastened joints. They help create a more stable and secure connection by providing a smooth bearing surface under the head of a bolt or nut.
5. Applications: SAE flat washers find widespread use in automotive applications, machinery, and various engineering projects where threaded fasteners are employed. They are essential for maintaining the integrity of connections and enhancing the overall reliability of assemblies.

When using SAE flat washers, it is crucial to consult the specific SAE standards relevant to the application to ensure proper fit and performance. The standardized nature of SAE washers simplifies the selection process and contributes to the efficiency and safety of engineered systems.