FENDER WASHER 5MM X 20*1.3 A4

A fender washer is a flat washer with an extra-large outside diameter compared to standard washers. This wide bearing surface spreads the load over a much larger area, making it ideal for fastening into thin, soft, or fragile materials. Fender washers help prevent pull-through, reduce surface damage, and offer added support where oversized holes or slots are present.