Does anyone know the thread size of the primary screws that bolt the outer primary to the inner primary? I just had the inner and outer primary powder coated and I want to remove bits of powder that may have got in the threads. I tried searching but couldn't find an answer. Thanks in advance!

 

That is a 1/4-20 UNC thread.

 

... and use a thread CHASER as opposed to a tap ... :>)

 

Thanks guys!