A nut having 6 flat sides and an integral washer which extends beyond the flats or periphery.
NSN 5910-01-057-7141
NSN 5975-01-451-1883
NSN 5905-00-539-2839
NSN 6130-00-557-8486
NSN 7035-00-991-6877
NSN 6110-01-444-5031
NSN 5935-00-850-7304
NSN 5920-01-128-2045
NSN 5965-00-560-5804
NSN 6620-01-591-6681
NSN 5950-00-658-9613
NSN 5990-00-331-4459