A washer or cone or disk shape with a centrally located hole, designed to accommodate a flat or oval head screw and provide additional bearing area on the material being fastened. It may or may not have a flush flange feature.
Classification: Copper washers including spring washers not threaded
NSN 5975-01-383-0422
NSN 6135-00-519-1325
NSN 6220-01-086-1171
NSN 6135-00-935-8769
NSN 6150-01-078-8659
NSN 5998-01-633-1817
NSN 5960-01-347-6791
NSN 5905-00-058-9513
NSN 5960-01-140-4253
NSN 6685-00-081-2864
NSN 5990-01-437-4876
NSN 5905-00-843-0819