A screw, (as modified) to which has been assembled one or more nonremovable washer(s).
NSN 6135-01-460-8830
NSN 6135-00-223-9563
NSN 5895-01-193-3216
NSN 5950-01-252-8698
NSN 4140-01-337-4625
NSN 6240-01-160-7934
NSN 4140-01-252-4392
NSN 7035-00-104-7613
NSN 5945-00-942-7813
NSN 5975-01-416-1745
NSN 5910-00-563-7333
NSN 6620-00-278-7313