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 5950-01-542-4602
NSN 6620-00-830-2821
NSN 5920-00-359-9771
NSN 5965-01-505-3716
NSN 6685-01-620-5400
NSN 6130-00-059-4642
NSN 6220-01-034-9063
NSN 5925-01-401-5314
NSN 5855-00-058-1293
NSN 5998-00-929-9652
NSN 6150-01-114-1748
NSN 5835-00-168-4258