A screw, (as modified) to which has been assembled one or more nonremovable washer(s).
NSN 7035-00-760-5479
NSN 6150-01-433-6437
NSN 5905-01-187-1888
NSN 4140-00-985-8202
NSN 6105-00-689-5643
NSN 2925-00-508-6032
NSN 6610-00-633-4338
NSN 5960-01-289-9733
NSN 5990-00-067-6791
NSN 5935-00-814-3028
NSN 6240-01-095-1273
NSN 6620-00-292-7000