A nut having 6 flat sides and an integral washer which extends beyond the flats or periphery.
NSN 5975-00-004-1458
NSN 7035-01-412-8322
NSN 5998-00-733-0015
NSN 6240-01-401-5340
NSN 5999-01-040-6367
NSN 2925-01-513-9114
NSN 5855-00-949-6590
NSN 5855-01-406-4821
NSN 6145-01-416-5808
NSN 4140-01-092-1098
NSN 6150-00-011-0111
NSN 2925-01-543-0073