A screw, (as modified) to which has been assembled one or more nonremovable washer(s).
NSN 5999-01-500-5888
NSN 7035-01-220-6392
NSN 5996-00-879-4654
NSN 5910-01-657-3992
NSN 5975-00-518-2129
NSN 7035-00-135-4758
NSN 5975-00-883-5806
NSN 6130-00-714-6275
NSN 5905-00-969-4152
NSN 4140-01-367-5824
NSN 6135-00-945-0015
NSN 6620-01-106-3553