A nut having 6 flat sides and an integral washer which extends beyond the flats or periphery.
NSN 5920-01-229-0623
NSN 5925-01-444-0929
NSN 6135-00-351-8606
NSN 5965-01-303-6105
NSN 5905-00-276-1918
NSN 6650-00-269-5000
NSN 5985-01-619-7352
NSN 5855-01-171-2818
NSN 5910-00-221-7461
NSN 6645-01-366-4344
NSN 5945-01-233-2326
NSN 6320-00-036-3688