A screw, (as modified) to which has been assembled one or more nonremovable washer(s).
NSN 5925-01-579-8993
NSN 5950-00-606-8916
NSN 5975-01-597-6886
NSN 5960-00-584-4553
NSN 6145-01-517-6708
NSN 5905-01-429-8929
NSN 5925-01-170-7899
NSN 5965-01-161-3405
NSN 5998-00-826-9332
NSN 6145-01-206-8071
NSN 5965-01-517-2000
NSN 5915-01-535-6666