A screw, (as modified) to which has been assembled one or more nonremovable washer(s).
NSN 5835-01-003-8076
NSN 6645-01-550-9669
NSN 5996-01-448-6814
NSN 5855-01-218-3735
NSN 5996-01-120-8348
NSN 5895-01-343-3782
NSN 5925-01-417-0807
NSN 7035-01-139-5707
NSN 5996-00-514-7678
NSN 5930-01-470-0099
NSN 6610-01-391-6781
NSN 6220-01-415-0926