A screw, (as modified) to which has been assembled one or more nonremovable washer(s).
NSN 6650-01-333-6641
NSN 6240-01-051-8699
NSN 5920-00-615-8897
NSN 5905-01-418-1017
NSN 5925-00-934-3365
NSN 5950-01-288-6688
NSN 5950-01-524-0568
NSN 5990-01-654-6203
NSN 6110-01-565-8805
NSN 4140-01-616-4802
NSN 6220-01-459-4631
NSN 5990-01-645-2592