I had the opportunity to print only a reduced version, under a small hazelnut.

The current version is calculated on nut with dimensions: 38 х 31.1 х 29.5mm.
'Oreshek.stl' is a nut model with maximum dimensions for nutcracker. You can use on it when scaling a nutcracker before printing.

After you print the 'valve' and 'screw' models, you must glue them together.