A nut having 6 flat sides and an integral washer which extends beyond the flats or periphery.
NSN 5945-00-490-0221
NSN 5996-01-167-3205
NSN 5935-01-421-8014
NSN 5965-01-068-2714
NSN 6240-00-848-3384
NSN 5985-01-303-6574
NSN 6110-01-127-9134
NSN 5915-01-222-8698
NSN 5835-00-419-6576
NSN 5990-01-023-3307
NSN 4140-00-557-7001
NSN 5925-01-442-5795