A Flat Washer is an essential component positioned beneath the head of a bolt or screw within machine joints. These small parts are used to distribute the clamping force of the fastener over a wider area, helping to prevent damage to the attached components and in some cases even preventing leakage of fluids through the fastened joint. There are a wide variety of washer configurations, with specific types being manufactured for unique and special applications. One of the most common is the flat washer, which receives its name from its flat design.
Although simple in form, flat washers are highly effective and work well across a range of applications. Whether they are needed to reduce the pressure of a bolt or screw, provide a smooth surface for tightening, or as a spacer between the fastener and the substrate, they can help ensure that the fastener is not damaged during installation.
Oftentimes, flat washers are made of stainless steel or other metals to ensure that they remain durable and corrosion-resistant. They may also be manufactured from plastic or rubber to provide flexibility or a seal when necessary, while other materials can be used for particular purposes such as copper or aluminum for electrical conductivity and heat dissipation.
In addition to being a useful construction accessory, flat washers are also an essential part of many automotive and panel assembly applications. This is because these washers are able to spread the compressive forces of the bolt or screw across a larger surface area, making them more efficient than a regular washer. This is especially important when working with thin or soft materials like those found in car bodies and panel assemblies.
Another variation on the flat washer is the fender washer, which is designed with an oversized outer diameter in relation to its central hole. This enables it to better spread the forces of bolts or screws in thinner and more flexible materials. This type of washer is commonly seen in automobile, panel and plumbing applications.
The most common flat washer is the SAE or Society of Automotive Engineers style, which features a smaller outer diameter and thickness than its USS counterpart. These washers are usually more durable and able to resist corrosion, making them ideal for the auto industry.
In order to avoid confusion between flat and spring washers, it is best to use the appropriate type for each application. Choosing the wrong washer for an application can result in damage to the connected components or failure of the fastener itself. When in doubt, it is always best to consult a professional. They can advise on the correct washers to use and help ensure that all fastener assemblies are properly constructed. Getting the right advice can save time and money, as well as avoid costly mistakes in the future. AFT offers a full selection of flat and spring washers in all standard sizes, materials and specifications. Samples and free CADs are available, so you can be sure you’re ordering the right product for your application.
