A nut having 6 flat sides and an integral washer which extends beyond the flats or periphery.
NSN 5855-01-425-6340
NSN 6645-00-004-4562
NSN 5835-00-408-5499
NSN 6150-01-515-3659
NSN 2925-00-167-6763
NSN 6610-00-618-6192
NSN 5920-01-360-5681
NSN 7035-01-383-9357
NSN 2925-01-170-1089
NSN 5990-01-082-3807
NSN 6610-01-316-8902
NSN 6145-01-386-1468