A bent spring metal washer with a centrally located hole. It is designed to exert pressure axially when assembled in place.
NSN 5925-00-757-7283
NSN 5965-01-234-6844
NSN 5998-01-484-6373
NSN 6105-01-634-0322
NSN 5960-01-458-7999
NSN 5950-01-209-9934
NSN 6130-01-028-6190
NSN 5935-00-866-2255
NSN 6240-01-064-2980
NSN 6320-01-371-3047
NSN 5975-01-549-5733
NSN 6320-01-583-6809