A nut having 6 flat sides and an integral washer which extends beyond the flats or periphery.
NSN 5930-01-131-9527
NSN 5965-01-322-8136
NSN 5905-00-897-0447
NSN 7035-01-517-1713
NSN 5950-01-469-2364
NSN 2925-00-623-3103
NSN 6110-00-129-8714
NSN 7035-01-392-5274
NSN 6145-01-463-1773
NSN 5930-01-246-3404
NSN 5945-01-445-6081
NSN 5999-00-135-4116