[Amps] Source for.Shaft Coupler/Adapter?

[Tomm Aldridge]

R.Measures wrote:

> I need to couple a 3/8" roller L tuning shaft to a1/4" shaft on a turns 
> counter,  The coupling must be RF-insulated.  Does anyone know of a 
> source?
> 
> Tnx
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McMaster-Carr has just about everything!  Try them.  Looking at one of 
my old mil isolater couplers, drilling out one side would cut through 
the material holding the set screw collar to the metal plate.