Stillpoints Ultra SS adapter needed, help...

If you have female thread on the speakers and on the Stillpoints, you need a step stud. You may find what you need at McMaster-Carr or Grainger.

Another possibility would be a threaded insert with 3/8-16 external and 1/4-20 internal threads. Then you could cut whatever length of 1/4-20 rod that you need.

If you can't find what you need, a machinist could make an appropriate length step stud from 3/8-16 threaded rod.

Minkwelder, thank you so much for your response. I am a little disappointed in Stillpoints in their help in this matter; I mean, their products are not exactly cheap. Stillpoints stated that it would take months and a very high price to supply what I need.

However, I think I did find just the right company to make this adapter. All of us Audiogonner's should tuck this contact into a safe place for future reference.
The name of the company is EVO Industries 1-800-386-4637 ask for Brian. They have threaded adapters and will make exactly what I need quickly for a very reasonable price.
I hope to get them next week.
Once I recieve them I will post my impressions.

Here’s a reducer bushing available from Amazon that should work 3/8-16 to 1/4-20 reducing bushing