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Advantages and Disadvantages of SAE Flat Washer

SAE Flat Washers

Fasteners are the building blocks for secure connections, and SAE flat washers are among the most popular. These washers are used to distribute the load of a fastener across a wider area, reducing pressure on the material and increasing stability. But like any other fasteners, SAE flat washers have their own set of advantages and disadvantages. So, in this blog post, we’ll discuss everything you need to know about SAE flat washers, their pros, and cons.

Advantages of SAE Flat Washer

Provides a Levelled Surface:

SAE flat washers fill gaps between the nut and bolt. Apart from filling gaps, they also provide a levelled surface for the nut to tighten and reduce the chances of loosening.

Prevents Damage:

SAE flat washers are a barrier between the nut/bolt and the surface. It helps prevent surface damage, whether it is wood, plastic, or metal.

Increased Stability:

Large-diameter SAE flat washers reduce the chances of fastener pull-through or material tear-out, leading to increased stability. These washers also prevent backing off of fasteners due to vibrations.

Corrosion Resistance:

SAE flat washers from materials like stainless steel and brass offer excellent corrosion resistance, making them ideal for longevity projects.

Disadvantages of SAE Flat Washer

Limited to less load-bearing applications:

SAE flat washers are unsuitable for load-bearing purposes and can’t hold heavy loads.

Requires Precise Measurements:

Unlike other washers, SAE flat washers require precise measurements, including the inside diameter, outside diameter, and thickness. Using the wrong size or thickness of the washer for a specific application can cause damage or lead to loosening.

Requires regular maintenance:

SAE flat washers can easily get damaged due to daily wear and tear, leading to decreased stability and rigidity.

Requires Skilled Workers:

The correct fitting and placement of SAE flat washers require skilled workers to perform the job. If not installed correctly, the load-bearing ability of fasteners or SAE flat washers can decrease.


SAE flat washers are versatile and ideal for applications where stability is essential, but it is important to understand their pros and cons before using them. Their excellent corrosion resistance, increased stability, and levelled surface make them ideal for everyday use. However, if you plan to use them for load-bearing applications, then it’s better to avoid them. Also, remember to measure the washer precisely and use the correct thickness, as using the wrong size or thickness of the washer can cause damage. Regular maintenance is required for SAE flat washers, and the skilled workforce must install them. You can make the most out of these washers by following these precautions.

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