Can anyone tell me the thread of a Farley handle?

[Fergus Bailey]

I want to screw something different onto the handle (where the ball is) on a Farley co-axial rest. Not sure what the thread is on that at present.

Thanks in advance

 

[SGS]

1/2 - 13 on mine.

 

[Fergus Bailey]

1/2 - 13 on mine.

Thanks Scott