#6 x 5/16 x .093 Flat Washer Nylon is a thin, flat disc with a hole in the center. It is used to distribute the load of a screw or bolt over a larger area, preventing damage to the material being fastened. This washer is made of nylon, which is a strong and durable material that is resistant to corrosion and wear. It is also non-conductive, making it ideal for use in electrical applications.