A nut having 6 flat sides and an integral washer which extends beyond the flats or periphery.
NSN 6240-01-459-7827
NSN 6110-00-147-6006
NSN 5835-00-936-8753
NSN 7035-01-003-9142
NSN 5920-01-502-5838
NSN 5930-01-257-3060
NSN 5835-01-130-8258
NSN 5910-01-286-6552
NSN 6685-01-099-6261
NSN 7035-01-038-9970
NSN 5835-01-327-0770
NSN 5960-01-543-0235