Why do fasteners for steel structures use washers?

1. If the substrate material is very soft and damage has occurred around the hole where the fastener is installed, there may be a problem of pull-through failure during the tightening process of the fastener. This is because in most cases, the force applied during the tightening process is sufficient to pull the fastener through the material motherboard, while the presence of washers helps to generate less accumulation pressure.

2. Some washers have a special structural design that prevents the nut from loosening. We commonly refer to this type of washer as a lock washer, and there are many types of structural forms, such as open end, star type, and wave type. This type of lock washer needs to be used in conjunction with the nut.

3. If the substrate material is very soft, it can cause damage to the surface of the substrate material during the process of screwing in bolts or screws. By using washers, this extrusion force can be distributed over a larger area to avoid damage to the surface of the motherboard.

4. When the surface of the motherboard where the bolt or screw is screwed in is not smooth and flat enough, the head of the fastener is likely to get stuck. By using washers, the surface of the bolt or screw can be ensured to slide, making installation easier.

Washers are a common standard component, and we often find the presence of washers during the tightening process of threaded connections such as bolts and nuts. It can be said that washers are always used with Threaded fastener such as bolts or screws.

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