To dream of seeing screws, denotes that tedious tasks must be performed, and peevishness in companions must be combated. It also denotes that you must be economical and painstaking. ... Ten Thousand Dream Interpretation

1- It will depend on what society we belong to as to how we interpret ‘screw’.

To the criminal element a screw will mean a prison officer or jailer.

To a younger element in society it is a slang word for the sexual act. So there could be word play even if the object seen Is a proper screw.

2- Screws suggest tasks that are seen to be pointless, except in a wider context.

To be screwing two pieces of wood together would presuppose that we intend to make something, so our action is a means to an end. Screws arc reputed to give a better join than nails; therefore the implication is that we arc building something to last. We need to take pride in our activities.

3- Spiritually we will be looking for satisfaction in a job well done. There is also a connection with the spiral (see Shapes).... Ten Thousand Dream Dictionary

Vision: Looking at screws: hold on to everything you own. Losing a screw: a very profitable relationship is coming to an end. Watching others work on a vise: it is likely that you’ll find yourself in a very tight spot. Working on a vise yourself: you are able to extricate yourself from a difficult situation. Working a screw into something: you have a well-rounded personality and your relationships are getting stronger.

A loose screw: a relationship is coming to an end.

Depth Psychology: Seeing a screw: you” want to strengthen and protect what you have already accomplished, making sure that your future is secure.

The vise is an obvious sign that you are in a very tight situation right now. Get out of it, let go!... Dreamers Dictionary