A nut having 6 flat sides and an integral washer which extends beyond the flats or periphery.
NSN 6105-01-185-1284
NSN 2925-01-456-6840
NSN 5910-01-633-9963
NSN 5985-01-548-9573
NSN 6645-00-149-1100
NSN 5998-01-157-9919
NSN 5835-00-003-0295
NSN 5965-01-057-3349
NSN 5965-01-554-4929
NSN 5855-01-393-2455
NSN 5990-01-013-8464
NSN 6685-00-661-2347