Dreams dictionary: Screw
Dreams dictionary: Interpretation 1
To see a screw in your dream represents your feelings of being taken advantaged or that you are messing things up. You are overlooking the little details that keeps and holds everything together. Alternatively, a screw may be a metaphor for having sex.
Dreams dictionary: Miller Dream Interpretation
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.