Serrated top surface
A bent spring metal washer with a centrally located hole. It is designed to exert pressure axially when assembled in place.
NSN 6320-01-652-3806
NSN 7035-01-024-9511
NSN 6150-00-081-9928
NSN 6685-00-624-8902
NSN 6130-01-650-1738
NSN 6145-00-308-0247
NSN 6130-01-549-6189
NSN 5960-00-910-7597
NSN 5950-00-763-6233
NSN 5965-01-043-5295
NSN 5910-01-196-6153
NSN 5935-01-603-2612