A nut having 6 flat sides and an integral washer which extends beyond the flats or periphery.
NSN 6685-01-074-8067
NSN 6110-01-493-6564
NSN 5965-01-011-9437
NSN 5990-01-334-8634
NSN 6610-00-886-3652
NSN 5985-01-048-2395
NSN 5930-00-985-4339
NSN 7035-01-287-5094
NSN 6150-01-457-1037
NSN 6650-01-524-8171
NSN 5998-01-359-1792
NSN 6105-01-565-5239