What does washer do

To comply with the new e-Privacy directive, we need to ask for your consent to set the cookies. Learn more. One succinct dictionary definition of a washer is "a perforated annular disc or flattened ring of metal, leather, or other material placed between two surfaces subject to rotative friction, to relieve friction and prevent lateral motion and unsteadiness". Whatever that means. Penny washers, also known as flat washers, are the most common kind that you're likely to come across and generally serve three distinct purposes:.

The creation of an effective seal against water ingress these are then known as plumbing washers. Nuts and bolts function by placing tension on a threaded shaft, strengthening the joint and reducing fatigue of the component; this is particularly important for variable loads such as machine parts that experience vibration. If any part deforms under these loads e. By providing a bridge between the gap, washers preclude this possibility. Used as a bushing to insulate fasteners or shafts within electronic equipment.

For this reason, shoulder washers are made of non-conductive materials, such as nylon. Avoid use in humid environments. Often described as looking like a miniature dog bowl without the bottom. They allow flat or oval head countersunk screws to be installed flush with the part surface.

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Articles you may also like: Why plastic fastener threading is important When is a screw not a screw? Lock Washers. Flat Washers. If a threaded fastener is being used to connect two objects, and one of those objects producing vibrates aggressively, using vibration damping washers can protect the other object from damage.

Other types of washers prevent the ingress of water and liquids. They are often used in water pipes and connections to create a waterproof seal.

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