Not really. Then you have the same thing. Why not get a bolt from Tru turn? Then you know it will match the holein the spinner. Granted, you could measure it and find one on line somewhere. Regardless, this is an easy issue to solve.

I really like my single bolt prop adapter. But you still need the same bolt to attach your spinner. This just eliminates having to drill the 4 holes in your prop. It takes a little effort to install as well. Not only that, it will move your spinner out about 3/16" from the cowl ring.