A screw, (as modified) to which has been assembled one or more nonremovable washer(s).
NSN 5920-00-925-2639
NSN 6105-01-422-3411
NSN 6135-01-522-3386
NSN 5895-01-458-6309
NSN 6110-00-429-4777
NSN 4140-01-172-4637
NSN 5998-01-223-7401
NSN 7035-01-062-0184
NSN 5998-01-318-8133
NSN 6685-01-549-3775
NSN 6150-00-009-4226
NSN 6620-01-443-3526