A screw, (as modified) to which has been assembled one or more nonremovable washer(s).
NSN 5975-01-544-1766
NSN 6110-00-329-3907
NSN 6135-01-388-2761
NSN 5915-01-414-5205
NSN 6220-00-232-9706
NSN 5960-01-367-6153
NSN 5985-01-441-3125
NSN 5950-01-199-7226
NSN 5925-01-041-6342
NSN 5935-01-035-1916
NSN 5975-01-457-7816
NSN 6650-00-826-7396