A nut having 6 flat sides and an integral washer which extends beyond the flats or periphery.
NSN 5998-00-456-8874
NSN 2925-01-556-0333
NSN 6220-00-531-4522
NSN 6105-01-530-3596
NSN 5925-00-003-4722
NSN 5998-01-055-4294
NSN 6135-01-142-6456
NSN 6110-01-119-7565
NSN 6130-01-548-2667
NSN 5990-01-193-0487
NSN 5835-00-155-1379
NSN 2925-01-647-7225