A screw, (as modified) to which has been assembled one or more nonremovable washer(s).
NSN 5855-01-353-3958
NSN 5950-01-238-5965
NSN 5998-01-508-7846
NSN 5960-00-073-1272
NSN 6110-00-121-0975
NSN 5835-00-372-3736
NSN 5915-01-304-4048
NSN 7035-00-782-7046
NSN 6320-01-447-4289
NSN 4140-01-236-7646
NSN 6220-01-207-8068
NSN 6135-01-398-5922