Screw It! Screw It?

[Astronymus]

But is still a "grip section" or just half of a pen?

[Newton Pens]

 

My Parker 45 Classic (black plastics, fitted with a "Student" version steel nib) has 5.5 turns...

 

 

Single lead threads.

 

 

In deed, these questions do belong together: me thinks the basic rule is, the fewer the turns, the coarser the thread.

 

 

 

Not always. With the Parker 51, so few turns is b/c of multi lead threads. So there are, I think 3 separate leads, which is why the 51 closes so quickly. I don't think many pens use multi start threads for section to barrel joining. The Lamy Safari uses double lead threads, so at least 50% of the time the logo on barrel lines up with top of nib.

 

Most pens use multi lead threads for cap to barrel, at least when using traditional v threads (rather than acme style).