We have a extensive range of washers in various materials. Washers should always be used under a nut as it spreads the surface area of the nut and prevents binding between the underside of the nut and the component being secured, helping to tighten the nut in a correct manner. Repair washers are for use where there is damage around the hole or the material is soft like plastic or rubber. Form C or G are a structural washer for spreading the load over a larger area often used when bolting wood together. We have a wide range of lock washers.