A screw, (as modified) to which has been assembled one or more nonremovable washer(s).
NSN 4140-01-062-3818
NSN 5990-01-378-7349
NSN 6145-01-187-4976
NSN 6610-01-271-1205
NSN 5920-00-583-8674
NSN 5985-01-218-7725
NSN 6685-01-560-4817
NSN 5835-00-874-1085
NSN 6685-00-448-1235
NSN 5915-01-005-0164
NSN 5965-00-964-1756
NSN 6105-01-461-5088