A screw, (as modified) to which has been assembled one or more nonremovable washer(s).
NSN 2925-01-305-1370
NSN 5920-01-145-4979
NSN 5998-01-208-7949
NSN 6240-01-462-5433
NSN 6145-01-440-8646
NSN 2925-01-327-3069
NSN 6620-00-286-5721
NSN 4140-01-437-7176
NSN 5985-01-423-9220
NSN 6150-01-048-9767
NSN 5935-00-470-6119
NSN 5930-01-382-9798