The Barnes MP38892 Copper Flat Washers are high-quality fasteners designed for various industrial and commercial applications. Made in the United States, these washers have a thickness of 5/16 inches and a hole size of #8. With a plain finish, these washers provide a sturdy and secure connection for your fastening needs. Available in a quantity of 25, these copper flat washers are a reliable and durable choice for your hardware requirements.