A screw, (as modified) to which has been assembled one or more nonremovable washer(s).
NSN 6645-01-501-0576
NSN 5835-01-641-0073
NSN 5905-01-436-8253
NSN 6645-01-058-3817
NSN 6240-01-359-6024
NSN 5920-00-456-5211
NSN 4140-00-836-6319
NSN 6650-01-050-8680
NSN 6130-01-046-5238
NSN 4140-00-728-3097
NSN 6620-00-343-8229
NSN 5905-01-622-3069