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 5915-01-031-0697
NSN 5999-01-380-5350
NSN 6645-01-648-4439
NSN 7035-00-104-7613
NSN 6610-00-862-5743
NSN 5910-01-555-7751
NSN 5998-01-408-6082
NSN 5999-00-051-0445
NSN 6650-00-262-2324
NSN 6620-01-173-8804
NSN 5915-01-513-9122
NSN 6620-00-043-6082