A nut having 6 flat sides and an integral washer which extends beyond the flats or periphery.
NSN 6105-01-158-2232
NSN 5910-01-052-9439
NSN 6130-01-223-5892
NSN 5965-00-961-1627
NSN 5905-00-280-2641
NSN 5855-01-406-9451
NSN 6130-01-553-4803
NSN 6135-00-221-4720
NSN 7035-01-145-5059
NSN 5930-01-483-1155
NSN 6130-01-008-1028
NSN 5945-01-382-3867