Collocations for nut - noun

cashew, macadamia, pistachio, etc.
chopped, mixed, salted
tree (esp. AmE)

crack, shell

allergy
nut-allergy sufferers

oil
tree

put on, screw on, tighten
loosen, remove, unscrew

nuts and bolts (often figurative)
a jar full of nuts and bolts
The documentary focuses on the real nuts and bolts (= the practical details) of the film-making process.
I got to learn the real nuts and bolts of running a company.