A bent spring metal washer with a centrally located hole. It is designed to exert pressure axially when assembled in place.
NSN 6110-00-735-6997
NSN 6135-01-296-1860
NSN 2925-01-510-2221
NSN 5935-00-005-7999
NSN 6645-00-884-5845
NSN 5895-01-071-6930
NSN 5996-00-905-6610
NSN 6150-01-571-1561
NSN 5950-00-246-5621
NSN 6145-01-423-0382
NSN 5996-00-905-6610
NSN 6135-01-196-7399