A screw, (as modified) to which has been assembled one or more nonremovable washer(s).
NSN 5950-00-111-1366
NSN 5998-01-633-2996
NSN 6645-00-102-0015
NSN 6110-01-094-0822
NSN 6650-01-599-9849
NSN 6130-01-506-3502
NSN 6240-00-480-7896
NSN 5960-01-583-4737
NSN 7035-00-834-2090
NSN 5855-00-135-9064
NSN 5990-01-191-1772
NSN 6135-00-223-9563