A screw, (as modified) to which has been assembled one or more nonremovable washer(s).
NSN 6610-01-212-9817
NSN 6105-00-678-2317
NSN 6150-01-144-1568
NSN 5990-01-118-8624
NSN 5895-01-548-1253
NSN 5945-01-193-5132
NSN 6645-00-155-2398
NSN 5910-01-633-9963
NSN 5950-01-273-1042
NSN 6110-01-545-6079
NSN 5910-00-248-9683
NSN 6135-00-919-1117