A screw, (as modified) to which has been assembled one or more nonremovable washer(s).
NSN 5945-01-071-7647
NSN 5996-00-484-9196
NSN 6145-01-595-1828
NSN 5975-00-933-0250
NSN 5835-00-529-6307
NSN 6110-00-075-6367
NSN 5950-01-371-6236
NSN 2925-01-141-7563
NSN 5855-01-129-4080
NSN 6610-01-267-3678
NSN 6610-00-987-9716
NSN 6685-00-128-2318