A screw, (as modified) to which has been assembled one or more nonremovable washer(s).
NSN 4140-01-565-0979
NSN 5975-01-056-5514
NSN 6685-00-633-2506
NSN 5930-01-111-0087
NSN 6220-00-948-1034
NSN 6220-01-032-3684
NSN 6220-01-600-0257
NSN 5910-00-233-7567
NSN 5835-01-424-0054
NSN 6220-01-245-8112
NSN 5895-00-171-0412
NSN 5835-01-423-9203