A screw, (as modified) to which has been assembled one or more nonremovable washer(s).
NSN 6145-00-936-0083
NSN 5950-01-057-2155
NSN 6110-01-495-2211
NSN 6145-00-815-4169
NSN 6610-01-495-2990
NSN 6220-01-452-0007
NSN 5905-00-554-4325
NSN 5950-01-463-3096
NSN 5935-01-156-0248
NSN 5915-00-258-4398
NSN 5960-00-685-9299
NSN 5985-00-161-5124