A screw, (as modified) to which has been assembled one or more nonremovable washer(s).
NSN 6645-01-114-8044
NSN 5855-01-494-8838
NSN 6220-00-776-0505
NSN 6110-00-471-3385
NSN 6610-00-229-6742
NSN 6145-01-628-2500
NSN 5910-01-107-8550
NSN 2925-00-371-2285
NSN 6110-01-269-0261
NSN 5935-00-328-4710
NSN 6320-00-225-7013
NSN 6110-00-149-8148