1/4 SAE Flat Washer Zinc Plated. SAE Washers are produced to comply with the Society of Automotive Engineers’ specifications. They are of smaller O.D. and thinner gauges than their counterpart bolt sizes of U.S. Standard Washers. Flat washers are often a critical component when assembling joints between bolts and occasionally nuts. They will immediately distribute the fastener’s load more evenly over its surface area, which prevents damage to the substrate’s surface while reducing the likelihood of gradual loosening. They can also help to cover