Aviation mission zone bridge crane, model 20858 table 7-10, page 7-19
A bent spring metal washer with a centrally located hole. It is designed to exert pressure axially when assembled in place.
NSN 5855-00-156-5489
NSN 7035-01-054-5208
NSN 5835-01-346-1386
NSN 6685-01-604-4054
NSN 5935-00-404-7895
NSN 5965-01-137-3769
NSN 6135-01-390-7364
NSN 6220-01-606-2847
NSN 6145-00-128-8686
NSN 6320-01-495-0512
NSN 5975-01-184-0011
NSN 6135-01-193-8154