The 1/4 x .063 NAS1149 Military Flat Washer is a thin, circular metal washer designed to distribute the load of a fastener, such as a bolt or screw, over a wider surface area. It is made of 18-8 stainless steel, which provides excellent corrosion resistance and durability. The washer has a diameter of 1/4 inch and a thickness of .063 inches, and it meets the specifications of NAS1149, a military standard for aerospace fasteners. This washer is commonly used in aircraft, spacecraft, and other demanding applications where high strength and reliab