A nut having 6 flat sides and an integral washer which extends beyond the flats or periphery.
NSN 6650-00-349-8732
NSN 7035-01-151-0265
NSN 6105-01-515-1231
NSN 5935-00-780-8004
NSN 5960-00-328-4058
NSN 5996-01-514-7341
NSN 6645-00-171-9639
NSN 5920-00-504-8634
NSN 6320-00-004-9158
NSN 2925-01-299-6967
NSN 5960-01-386-7086
NSN 5998-01-117-7048