I have a 5 iron that has a little dent in the shaft. I was wandering if this is "unconforming" to the rules? I read the rule book and under rule 4-3c it says a player may use a damaged club prior to the round as long as it conforms to the rules. Well is a little dent in a shaft considered a "damaged" club? Also, what exactly defines "conforms with the rules."

In general is it safe to play with this 5 iron or can I be disqualified?