A screw, (as modified) to which has been assembled one or more nonremovable washer(s).
NSN 6650-01-573-7165
NSN 6645-01-517-0259
NSN 5920-01-218-5415
NSN 5915-01-074-4530
NSN 5996-00-336-3046
NSN 5920-01-294-2805
NSN 6620-00-773-2931
NSN 5975-01-443-7262
NSN 4140-01-231-2286
NSN 5895-01-195-9664
NSN 5935-00-204-9074
NSN 5996-01-550-8867