Why ss 304 screw need add washer?

Why ss 304 screw need add washer?: ss 304 screw and washer are mainly used to prevent looseness. We have previously said that there are several ways to prevent the screws

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Where To Find Stainless Steel Cap Screws Suppliers?

stainless flat head screws, surface a variety of color can do it?

screw manufacturer, custom screw, screw supplier