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 5835-01-094-2662
NSN 6220-01-451-3056
NSN 6645-00-435-5610
NSN 6240-00-557-7471
NSN 5998-01-254-3734
NSN 6130-01-032-3966
NSN 6320-01-643-0850
NSN 6220-00-169-6516
NSN 6110-01-232-1329
NSN 6145-00-553-8196
NSN 5990-01-281-3120
NSN 5990-01-254-2936