A nut having 6 flat sides and an integral washer which extends beyond the flats or periphery.
NSN 5965-00-990-8669
NSN 6145-00-228-7606
NSN 5930-01-237-1727
NSN 6145-00-405-2737
NSN 5855-00-862-3345
NSN 5999-01-502-7101
NSN 5920-01-604-2766
NSN 5965-00-226-7870
NSN 5996-00-296-9629
NSN 6130-00-977-5970
NSN 5985-00-592-5818
NSN 5905-00-187-4552