A nut having 6 flat sides and an integral washer which extends beyond the flats or periphery.
NSN 6620-00-827-1611
NSN 5930-00-169-9860
NSN 5960-01-310-3355
NSN 7035-01-237-8653
NSN 5960-00-266-6741
NSN 6145-01-306-9133
NSN 5930-00-858-4638
NSN 5985-01-569-6769
NSN 5990-01-386-3040
NSN 5895-00-903-1109
NSN 2925-01-513-0720
NSN 5835-01-439-0180