A nut having 6 flat sides and an integral washer which extends beyond the flats or periphery.
NSN 6145-01-255-2751
NSN 6645-00-551-8291
NSN 6145-01-211-6591
NSN 5999-01-560-5544
NSN 6240-00-922-1021
NSN 5935-00-752-3083
NSN 6135-00-973-5632
NSN 5915-01-069-4010
NSN 6220-00-635-8818
NSN 6105-01-350-3333
NSN 6135-00-563-7711
NSN 5895-00-845-2849