The Hillman Group 280326 1/2-Inch Flat Washer Hardened, 50-Pack Product Description Flat Washer (SAE) Yellow Dichromate . From the Manufacturer Used in applications with nuts and bolts. The flat washer provides a greater bearing surface which helps prevent a nut or bolt head from tearing through the material. Flat washers are commonly used in decks and fence building. The called out size is the inner diameter of the washer. Features Flat Washer (SAE) Yellow Dichromate Country Of Origin: Taiwan, Province Of China From The Brand Name: The Hillman Group Model Number: 280326 USA SHIPPING estimates delivery times and we work to get your item to you as quickly as possible and within those times, but please know it may take slightly longer than the estimate.