These 8 x .016 NAS1149 Military Flat Washers are manufactured from 18-8 stainless steel and meet the requirements of DFAR. They have an outer diameter of 0.438 inches, an inner diameter of 0.188 inches, and a thickness of 0.016 inches. These washers are designed to distribute the load of a fastener over a larger surface area, reducing the risk of damage to the mating surfaces. They are commonly used in aerospace, military, and other demanding applications where high strength and corrosion resistance are required.