A screw, (as modified) to which has been assembled one or more nonremovable washer(s).
NSN 4140-01-587-5770
NSN 5855-01-299-3510
NSN 4140-01-075-5455
NSN 5930-00-714-9297
NSN 6685-00-133-4225
NSN 5930-01-326-2828
NSN 5935-01-378-6536
NSN 5945-00-946-1155
NSN 5965-01-545-8562
NSN 5895-01-541-2349
NSN 5960-01-162-2304
NSN 5960-01-029-4253