A nut having 6 flat sides and an integral washer which extends beyond the flats or periphery.
NSN 5945-01-486-5541
NSN 6620-01-023-2938
NSN 2925-01-394-9658
NSN 6105-00-063-2007
NSN 5855-00-962-5792
NSN 5950-01-195-5503
NSN 6240-01-025-2553
NSN 5996-00-930-8127
NSN 5950-01-227-9932
NSN 6620-01-241-9592
NSN 6220-01-390-9538
NSN 5985-01-294-6009