Just pop over to the nearest Ace Hardware. They have the bolts. Yup, if one broke then they are all suspect. Ain't that fan clutch fun! The sadistic bastid who came up with THAT configuration has a special place in my version of Hell.

Might be a good idea to pick up a tap and clean the threads whilst you are this far into it. Use a Never-Seez type of product on the threads NOT a Teflon tape or a thread locker sealant.

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“Whatever story you're telling, it will be more interesting if, at the end you add, "and then everything burst into flames.”
― Brian P. Cleary, You Oughta Know By Now