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 5985-01-067-9507
NSN 5915-01-525-7625
NSN 5960-01-186-2980
NSN 5975-00-803-8636
NSN 5950-01-608-3142
NSN 5910-01-442-6752
NSN 6105-01-269-1988
NSN 6610-01-656-0041
NSN 5960-00-790-9946
NSN 6610-01-095-5037
NSN 6620-00-366-1365
NSN 5996-01-295-2004