A nut having 6 flat sides and an integral washer which extends beyond the flats or periphery.
NSN 5855-01-353-3958
NSN 6220-01-421-0352
NSN 5996-01-131-9353
NSN 4140-00-393-1707
NSN 6135-01-236-8603
NSN 6645-01-449-0785
NSN 2925-01-230-8057
NSN 5925-01-160-9069
NSN 6145-01-494-1486
NSN 5925-00-396-2412
NSN 5965-01-446-6945
NSN 6130-00-805-1864