A screw, (as modified) to which has been assembled one or more nonremovable washer(s).
NSN 6620-01-611-2038
NSN 5975-01-366-6876
NSN 5835-01-360-2657
NSN 6135-00-377-9165
NSN 5965-01-643-1951
NSN 5935-00-966-6214
NSN 5935-01-508-6262
NSN 6685-01-334-9893
NSN 5925-01-489-1783
NSN 5950-01-554-6180
NSN 6135-01-412-0404
NSN 6645-01-605-8796