A screw, (as modified) to which has been assembled one or more nonremovable washer(s).
NSN 6145-01-043-4530
NSN 5985-01-132-4226
NSN 2925-01-510-9378
NSN 5990-01-537-1124
NSN 5930-01-422-5483
NSN 4140-01-631-4080
NSN 5999-01-634-0576
NSN 5998-01-013-9293
NSN 6220-00-587-0429
NSN 6135-01-364-2738
NSN 6610-00-913-1704
NSN 5950-01-506-4694