Quote:
Originally Posted by Rick Parker
With aluminum heads any bolt that is made of any material grade 5 or better will work. The threads in the head will fail before the bolts. For my pan I purchase hardened studs at the farm implement store and use mechanical locking jet nuts.
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100% agree, the yield of the stud/bolt is less than the alloy head thread.
Tighten to the factory spec which will be based on a safe thread strength margin and ensure the nut or bolt has anti vibration to stop un-threading. i.e. serrated face nuts bolts or a lock washer.