A screw, (as modified) to which has been assembled one or more nonremovable washer(s).
NSN 6620-01-575-7879
NSN 5996-00-083-6433
NSN 6610-01-386-7542
NSN 5835-01-157-5886
NSN 5895-01-121-0114
NSN 6645-01-514-7901
NSN 5985-00-988-5268
NSN 6645-01-206-4888
NSN 5855-01-054-9014
NSN 5905-01-085-3867
NSN 6645-00-102-0015
NSN 5915-01-393-0348