A nut having 6 flat sides and an integral washer which extends beyond the flats or periphery.
NSN 5945-00-006-3533
NSN 6620-01-629-4045
NSN 5960-01-423-2511
NSN 5935-01-027-3201
NSN 6135-01-611-0125
NSN 6620-01-558-6558
NSN 5965-00-052-9184
NSN 6610-01-247-1798
NSN 2925-01-094-4771
NSN 6110-01-149-0147
NSN 6645-01-633-1852
NSN 6145-01-200-2176