What a pleasant surprise to remove the light retaining ring and "not" have the stand-offs fall off.
Somebody with some ingenuity wrapped the screw threads with what looks like 3M 27 glass cloth tape. Just the right thickness to secure the stand-off, but not so tight that it couldn't be pulled off.
No more struggling to position and start the screws and having the stand-offs fall off before the screw is seated.
MD-11 AMM 33-43-01