A flat annulus or ring, often of metal, used to spread the load of a screwed fastening. Additionally, a plain washer may be used when the hole is a larger diameter than the fixing nut. They provide the strength of heat treating and the corrosion resistance of a stainless steel and can be used in atmospheres. Where a flat washer is required to span a large hole in a component, a nyloc nut (nylon insert) must be used. Unsure which fastener is best for your job? Call us at 86-573-82869272 or Contact Us and one of our trained technicians will help you find the right fasteners for your application.