Trying To Source A Pen Part...

August 7, 2019

I am trying to make a fountain pen from scratch, and would prefer to use the type of cap closure that consists of a component mounted up inside the cap that has flexible "fingers" that grab the rim of the section, clicking the cap into place.

It appears to me that the part I am seeking may be made of nylon or other strong flexible plastic. I will probably need a few of these, perhaps a couple of dozen, as I plan to make the pen for some friends as well as myself.

If anyone knows where I might source this part, I would certainly appreciate hearing from you.

john@jehubbard.com

John Hubbard

August 8, 2019

Hmm, I'm wondering if it would be possible to get a suitable part 3D printed. These days you can 3D print in a variety of materials after all.

I've seen inner pen caps on alibaba or aliexpress or one of those sites, but they're not easy to find, especially if you want small quantities (less than 1000 pieces...).

August 8, 2019

I suggest to buy Chinese pens and use for parts.

If you buy for example some jinaho x450 you can get nibs, clips, feeders, converters and also the inner cap you are looking for.

And you will pay less than the cost of the parts.

August 8, 2019

I suggest to buy Chinese pens and use for parts.
If you buy for example some jinaho x450 you can get nibs, clips, feeders, converters and also the inner cap you are looking for.
And you will pay less than the cost of the parts.

That, sir, is a GREAT idea!

I was just looking at a picture of a TWSBI GO and it has exactly the part I'm looking for. The jinhao would be less expensive than the TWSBI.

August 8, 2019

Here is a picture of the inner cap part and the corresponding section lip from a TWSBI GO. Fortunately this cap is transparent so that the inner cap can be seen pretty well.