A screw, (as modified) to which has been assembled one or more nonremovable washer(s).
NSN 7035-01-508-6447
NSN 5960-00-104-5955
NSN 5965-00-249-6980
NSN 5855-01-061-6890
NSN 5855-01-236-9645
NSN 5895-01-052-0644
NSN 5950-00-905-6887
NSN 6145-01-089-1658
NSN 5950-01-659-9470
NSN 7035-01-287-9817
NSN 6110-01-228-7221
NSN 5930-01-481-3851