I guess this question goes here

[larcor69]

Simple, I'm sure it's been heard before but a quick what size collar will 2 440 rods fit through to clamp them down together

 

[brad nichols]

5/32" If I remember rite

 

[mercguy]

I think 3/16" is the size I use.
Bill Hoch

 

[Hydro Junkie]

A 4-40 rod is 7/64" so two would be 7/32 from what I have been able to find. I could double check when I get home from work. If that is the correct figure, then a 3/16 to 1/4" should be about right