A screw, (as modified) to which has been assembled one or more nonremovable washer(s).
NSN 4140-00-170-5152
NSN 6650-01-308-7284
NSN 5930-01-227-7006
NSN 6220-01-595-8979
NSN 5985-01-106-7400
NSN 6650-01-429-6692
NSN 7035-01-322-8180
NSN 6240-00-215-8550
NSN 5998-01-142-4217
NSN 5999-01-010-4695
NSN 6105-01-437-8341
NSN 5895-01-293-3579