The 1/2 x .063 NAS1149 Military Flat Washer is a thin, circular piece of 18-8 stainless steel used to distribute the load of a fastener, such as a bolt or screw. It has an outer diameter of 1/2 inch and a thickness of .063 inch. The washer conforms to the National Aerospace Standard (NAS) 1149 and meets the requirements of the Defense Federal Acquisition Regulation Supplement (DFARS). It is designed to provide a smooth, flat bearing surface for the fastener, preventing damage to the material being fastened. The washer is corrosion-resistant and