A nut having 6 flat sides and an integral washer which extends beyond the flats or periphery.
NSN 6110-00-724-8112
NSN 5965-01-196-7760
NSN 5925-01-337-9677
NSN 6610-01-164-9477
NSN 5895-01-204-2726
NSN 5905-01-472-2366
NSN 6150-01-421-9351
NSN 5960-00-297-7099
NSN 4140-01-509-4574
NSN 5975-00-370-0401
NSN 5945-01-354-2155
NSN 5996-01-190-9982