Thanks AV8TOR for the reply.I was wondering about the strength of threaded rod myself earlier.Your right that it is indeed rather bendable compared to any graded bolt.The problem with using a bolt though will be finding a bolt that has enough threaded length to it.Usually,you will find 5/16" bolts in various lengths at the fastener store but after a certain length(?),the threaded portion of the bolt doesn't get any longer,only the upper unthreaded neck portion does.It would be nice to have the rod thread deep enough into the prop adapter so that it butts up against the threaded crank portion.That way you know for sure that your indeed tightening down the spinner nut to the prop and not accidentally turning the threaded rod portion further into the prop hub.In which case,just how many threads would that spinner nut be engaging?A possible accident in the making?Maybe.I know that the Loctite would prevent the rod from turning but just how many tightenings and loosenings will it take before it comes loose.Thus the need to thread in as far as possible.I think what I'm looking for here is a 5/16"-24 automotive grade "stud".I'll have to measure the prop adapter internally for thread depth(installed on the engine) and see if there is a stud available that is long enough to do the trick.However,I may be wrong about this but I think most automotive grade studs that would be the correct length for this application,aren't fully threaded either.DOH!![:@].........