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 7035-01-649-8977
NSN 5985-01-108-4328
NSN 6135-00-196-5267
NSN 5920-00-647-3467
NSN 6650-01-322-6431
NSN 6610-01-340-1761
NSN 5925-00-848-9073
NSN 5905-01-451-3003
NSN 6150-01-184-3208
NSN 6150-00-811-7208
NSN 5915-01-641-3183
NSN 4140-01-641-3325