A nut having 6 flat sides and an integral washer which extends beyond the flats or periphery.
NSN 5960-00-962-5391
NSN 5996-01-039-2704
NSN 5925-01-609-9826
NSN 5910-01-278-9950
NSN 5999-00-233-6366
NSN 5910-01-492-6028
NSN 5910-01-483-3618
NSN 6240-00-438-6999
NSN 5935-01-170-4417
NSN 5998-00-274-4929
NSN 6135-01-142-2417
NSN 5945-01-384-2765