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 5925-00-816-6658
NSN 6130-01-533-0783
NSN 6150-01-620-0391
NSN 5975-01-219-9536
NSN 6320-01-349-5515
NSN 5895-01-159-0288
NSN 6685-01-138-2661
NSN 5905-01-598-6292
NSN 5910-01-384-9152
NSN 6645-01-480-3962
NSN 6105-01-366-0560
NSN 6150-01-599-9495