A screw, (as modified) to which has been assembled one or more nonremovable washer(s).
NSN 6130-01-599-6410
NSN 6685-00-547-6218
NSN 5996-01-441-5798
NSN 5985-01-434-6080
NSN 5965-00-782-8920
NSN 5975-01-014-7231
NSN 6135-01-581-8163
NSN 5999-01-106-2612
NSN 5985-00-948-7090
NSN 6130-01-048-7944
NSN 5960-00-269-4762
NSN 7035-00-155-9513