Hi Mike,the spinner nut that I'm planning on using is a Dubro #731.It has a larger surface area than the Higley safety spinner nut giving the starter cone more area to grip when turning it over.Here's a listing for Dubro's on-line catalogue.Check out page-52 to see what I'm referring to.

I couldn't find a bolt with enough thread length or a proper automotive type stud that would suffice at any of my local fastener shops so I settled on 5/16"-24 threaded rod which I'm told has a grade of "B7".He said that the rod was an alloy.I've never heard of this grade rating before but I'm told that it is stronger than a grade 5 but not as strong as a grade 8.I'll be cutting it to the required length and Loctiting it into the prop hub assembly probably with red Loctite.The Dubro spinner nut will hold the prop on the threaded rod portion and it will most likely be Loctited on with blue Loctite.Whether Loctite is necessary on the spinner nut or not I'm not to sure of as my Thunder Tiger 1.20 turns this 16x8 a lot faster than this Homelite ever will and I've never had the spinner nut loosen off of it at any point.This should work just fine..........hopefully.

http://dubro.com/DUBRO2005CATALOG/index.htm