Cap Threads - Section or Barrel?

[glycerine]

I've got a jr Statesman on my desk from several years back and it's a quad. Not sure about the newer ones though, I believe all of those are at the house...

 

[glycerine]

Interesting, just found a newer model and it is a double...

 

[Andrew_K99]

The one in my desk is triple ...

 

[Russianwolf]

Interesting, just found a newer model and it is a double...

guess they are making some changes. It's been a while since I got any.

 

[glycerine]

In my best Forrest Gump voise: "threads on pen kits are like a box of chocolates... you never know what you're gonna get."

 

[Curly]

I'd like to make threads like a Jr Statesman. They look much nicer without sharp edges and they don't look so dense. I think I followed one of the threads around the pen and it made 1 revolution.

They are some kind of square thread like the ones you see on clamps and vise threads. An Acme thread is an example. If you want to make them you will most likely have to cut them with a metal lathe or make a tap and die with one.