The item is a flight safety critical aircraft part (fscap).
A nut having 6 flat sides and an integral washer which extends beyond the flats or periphery. An integral feature is incorporated for locking on the threads of a mating member.
Classification: Nuts of iron or steel
NSN 5996-01-094-9754
NSN 6240-01-334-6046
NSN 5895-01-437-8871
NSN 6320-01-289-0946
NSN 5835-01-495-5986
NSN 5965-01-472-3664
NSN 5855-00-763-2155
NSN 5920-01-417-3142
NSN 5935-01-086-0564
NSN 6685-01-473-8393
NSN 5835-01-132-5894
NSN 6650-00-276-9838