A screw, (as modified) to which has been assembled one or more nonremovable washer(s).
NSN 5895-00-058-7891
NSN 5965-01-455-2301
NSN 7035-00-553-6951
NSN 5920-01-367-2542
NSN 5915-01-128-3231
NSN 5960-00-004-6636
NSN 5910-01-050-7462
NSN 5930-00-292-1089
NSN 7035-00-193-2269
NSN 5910-00-059-8322
NSN 6145-01-099-9620
NSN 6145-01-091-4004