A bent spring metal washer with a centrally located hole. It is designed to exert pressure axially when assembled in place.
NSN 7035-00-803-3056
NSN 4140-01-550-4627
NSN 5975-01-495-0991
NSN 5925-00-329-9190
NSN 6685-00-026-7691
NSN 6650-01-516-1559
NSN 2925-01-206-7948
NSN 5855-00-532-0025
NSN 6650-01-330-6740
NSN 6650-00-551-7708
NSN 6610-00-920-3006
NSN 6135-01-616-4950