Are gear hanger bolts the same a chainring bolts?

you are better of using a specific rear mech hanger bolt as it will clamp the hanger snugly to the frame . using some chain ring bolts can cause an issue, If the female part of the bolt is too long it wont clamp the hanger properly, and if the male bit is too long it protrudes towards the cassette and you can risk catching the chain on it.

better to use the correct bolt as they only cost pennies from any lbs anyways
 
Thanks everyone, I had a nose in my bits box and found a spare single speed chain ring bolt which fits like a charm.
 
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