A nut having 6 flat sides and an integral washer which extends beyond the flats or periphery.
NSN 6240-00-923-8944
NSN 6150-00-084-0240
NSN 5920-00-880-0603
NSN 6220-00-895-7218
NSN 5999-01-355-2236
NSN 4140-00-007-5726
NSN 6645-01-012-7670
NSN 5960-01-368-5874
NSN 6320-01-631-7828
NSN 7035-01-652-0559
NSN 4140-01-627-1726
NSN 5930-00-229-6630