Basic system goes crazy and runs wild (4,3,5)

I believe the answer is:

nuts and bolts

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'basic system goes' is the definition.
The definition suggests a plural noun which matches the answer.

'crazy and runs wild' is the wordplay.
'crazy' becomes 'nuts' (nuts can informally mean crazy or mad).
'runs wild' becomes 'bolts' (I am not sure about this - if you are sure you should believe this answer much more).
'nuts'+'and'+'bolts'='NUTS AND BOLTS'

Can you help me to learn more?

(Other definitions for nuts and bolts that I've seen before include "Basic essentials (colloq.)" , "Essential basics" , "Means of securing" , "Basic practical details" , "Fundamentals" .)

I've seen this clue in The Globe and Mail.

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