A nut having 6 flat sides and an integral washer which extends beyond the flats or periphery.
NSN 5930-00-992-3939
NSN 6685-00-559-2742
NSN 6320-00-032-4853
NSN 5990-01-255-7387
NSN 5835-01-157-5886
NSN 6145-01-419-4311
NSN 7035-01-227-2546
NSN 4140-00-990-8389
NSN 5945-00-145-5604
NSN 5985-01-008-4787
NSN 6135-01-174-3807
NSN 5975-00-613-9064