Many of the new Lens hoods are quite loose, they come off far to easy for my liking so usually I put in a piece of nylon to fill the gap that is supposed to give way when loosening the hood, works on AFS 1.4; 24mm 35mm 85mm and some other zooms but the New Noct-Nikkor has another design as does the New 300 ED 4.0
There are two sets of springs, one set for mounting normally and one set for reveres mounting the hood.
Here I have simply drilled two small set screws instead of having the little triangles holding it into place.
Naturally it's fixed until I unscrew the two set screws - But I like it like that