Does the extra long stainless steel screws need gasket?

On some screws we can see the presence of gasket, spring cushion, this kind of screw is called a combination screw. But do the extra long stainless steel screws also need gaskets?

The main purpose of mounting gaskets and spring pads on screws is to reduce the contact area between screws and assembly products, prevent loosing, and protect assembled products and screws.

Gasket is generally made of sheet material, such as pad paper, rubber, silicone rubber, metal, cork and so on. Gaskets for specific applications may contain asbestos. In some cases, the machined surface may not be as smooth as it should be, and the use of gaskets can fill in those irregularities.

Therefore, if the surface of the product that the extra long stainless steel screws needs to be screwed in is not smooth and level enough, the head of the screw may get stuck when it is screwed in, so in this case, it is possible to add gaskets to the long screw.

Of course, if the material is very soft, extra long stainless steel screws can increase the gasket, which can distribute the extrusion pressure in a larger area, so as to avoid causing damage to the surface of the item.

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