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 5990-01-529-7307
NSN 5950-01-489-1164
NSN 5996-00-161-4202
NSN 5965-01-571-7958
NSN 5905-00-678-3564
NSN 5925-01-030-9227
NSN 6110-01-519-2636
NSN 5975-01-463-2881
NSN 6110-00-524-3085
NSN 6610-01-644-2546
NSN 5905-01-575-9084
NSN 5965-01-378-7335