A screw, (as modified) to which has been assembled one or more nonremovable washer(s).
NSN 5950-01-138-6773
NSN 5998-01-631-1751
NSN 5945-01-170-3321
NSN 6620-01-060-9761
NSN 6620-01-222-8820
NSN 5920-00-914-2707
NSN 5998-00-051-1062
NSN 5920-00-717-6839
NSN 6620-00-226-2285
NSN 6610-01-552-2151
NSN 6645-01-116-9634
NSN 5998-01-596-1764