A nut having 6 flat sides and an integral washer which extends beyond the flats or periphery.
NSN 5960-00-466-3523
NSN 5975-01-607-3282
NSN 5895-01-107-6436
NSN 6650-01-406-3086
NSN 6130-01-141-7038
NSN 6105-01-414-8829
NSN 6645-01-140-8204
NSN 6610-00-548-3452
NSN 5975-01-529-7923
NSN 5996-01-630-2492
NSN 5855-00-482-9876
NSN 5935-00-067-4870