A screw, (as modified) to which has been assembled one or more nonremovable washer(s).
NSN 6145-01-401-3713
NSN 5930-01-394-6811
NSN 5975-00-510-4121
NSN 6220-00-205-2040
NSN 6610-01-391-5092
NSN 5965-01-659-5528
NSN 6620-01-221-2643
NSN 6130-01-026-2001
NSN 5915-00-755-9664
NSN 6610-00-575-7933
NSN 6130-00-829-1754
NSN 5895-01-523-0822