A screw, (as modified) to which has been assembled one or more nonremovable washer(s).
NSN 5920-00-977-9782
NSN 6135-01-104-3790
NSN 5990-01-432-4984
NSN 6685-01-610-2892
NSN 5935-01-327-2340
NSN 5925-00-498-2008
NSN 6110-00-478-9128
NSN 5975-00-980-1123
NSN 5999-00-116-8983
NSN 5945-00-887-1992
NSN 5998-00-814-8394
NSN 5998-01-181-3875