A nut having 6 flat sides and an integral washer which extends beyond the flats or periphery.
NSN 5945-01-019-6922
NSN 5999-01-308-6720
NSN 6320-01-497-3116
NSN 6110-01-003-9614
NSN 5975-00-157-9676
NSN 2925-00-233-5644
NSN 5835-01-406-4066
NSN 5835-00-190-3401
NSN 6645-01-435-8356
NSN 5945-01-392-0898
NSN 6620-01-032-3937
NSN 6105-01-327-5419