A nut having 6 flat sides and an integral washer which extends beyond the flats or periphery.
NSN 6135-00-643-4843
NSN 5915-01-176-2048
NSN 6110-01-295-7428
NSN 6620-00-988-9170
NSN 7035-01-512-1826
NSN 7035-01-630-2598
NSN 5950-00-300-0287
NSN 6620-01-411-5750
NSN 6135-01-390-7364
NSN 6130-00-879-4100
NSN 6240-01-357-0305
NSN 6110-00-088-8269