A nut having 6 flat sides and an integral washer which extends beyond the flats or periphery.
NSN 7035-01-145-5059
NSN 6135-01-415-1163
NSN 6105-01-171-9653
NSN 6240-01-277-3762
NSN 6645-00-292-0093
NSN 4140-00-043-0279
NSN 5905-01-576-0174
NSN 6110-01-494-1461
NSN 5999-00-476-9571
NSN 5996-01-619-3488
NSN 5915-01-111-0460
NSN 6105-01-389-0592