A nut having 6 flat sides and an integral washer which extends beyond the flats or periphery.
NSN 2925-01-534-7314
NSN 5895-01-403-2793
NSN 5835-01-200-7153
NSN 5990-01-434-7913
NSN 6685-01-255-4039
NSN 5935-01-338-9083
NSN 5945-00-949-3367
NSN 6150-01-025-0423
NSN 6240-00-684-8181
NSN 5930-01-429-5621
NSN 6220-01-235-3892
NSN 6220-01-264-8944