A screw, (as modified) to which has been assembled one or more nonremovable washer(s).
NSN 5855-01-020-7982
NSN 6110-01-489-1671
NSN 6150-01-218-8454
NSN 6685-00-928-7639
NSN 5998-00-152-7915
NSN 6240-01-126-4461
NSN 6220-00-269-4556
NSN 6610-01-204-9146
NSN 6105-00-004-6941
NSN 5960-01-049-4374
NSN 6145-01-523-3871
NSN 6150-01-250-7510