A nut having 6 flat sides and an integral washer which extends beyond the flats or periphery.
NSN 6685-00-859-1362
NSN 5998-00-463-7158
NSN 6220-01-290-0124
NSN 6240-01-241-5209
NSN 5895-01-173-3142
NSN 6320-01-522-0318
NSN 4140-00-711-8354
NSN 4140-00-035-4997
NSN 2925-01-113-6904
NSN 5835-01-258-5597
NSN 6135-00-985-7887
NSN 6645-01-556-5263