When it comes to industrial materials, washers are considered an important material that contributes to the prevention of galvanic corrosion in screws, bolts, and nuts specifically also by providing insulation to steel screws that are installed in aluminum surface.

There are actually three types of washers that can be applied or installed together with screws, bolts, and nuts. These are; plain washers, spring washers, and locking washers which has its own unique functions and features but has a sole purpose which is to prevent any surface damage of any frames.

Plain washers are the type of washer that has a spread on a load to prevent any damage to the surface that is undergoing a repair, and it can also provide an insulation particularly electricity.

Spring washers, meanwhile, have an axial flexibility that keeps the fasteners in metal or steel frames from loosening due to vibrations. This keeps the fasteners tightened to each other to keep the frames in structures strengthened.

Locking washers, on the other hand, also prevents fasteners in steel frames from loosening as well but, it has a different function by preventing the screws from rotating which causes the fasteners to loosen.

quality standards for washers

Usually, before being brought to the market, washers undergo scrutinizing product quality standard tests to ensure that it follows standards that are imposed by the American National Standards Institute (ANSI).

ANSI is the one that monitors the quality standards for washers that are used in various industries.

The three above mentioned types of washers are the most common types that are used for different purposes and there are actually other types of washers available in the market. These are; fender washer, penny washer, spherical washer, anchor plate, torque washer, Spring and locking washers, curved disc spring, Wave washer, split washer, and toothed lock washer.

The most common washers are made up of steel because of its ability to tolerate harsh conditions and adds more reinforced strength to which it is applied to. There are two types of steel-made washers, type A and B which has different specifications.

Type A is the one that has a broader tolerance but has a minimal precision while type B tolerates tighter diameters for specific bolt sizes.

If you look at a washer, your first glance and comment would be that it looks like “useless” because it appears to be a thin metallic plate often shaped like a disc that has a hole in the middle of it.

However, in the construction industry and other industries, it is considered to be very useful because it is responsible in the distribution of the fastener’s load like a screw, a bolt, or a nut. It is also used as a spacer, a spring, a wear pad, a pre-load indication device, a locking device which is to prevent any possibilities that the fasteners could loosen up that may weaken any structures that are strengthened by steel frames by reducing any vibrations and rotations caused by sudden movement or harsh conditions and above all, it prevents the fasteners from having galvanic corrosion.

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