Parker Vac Missing Threads

[CraigR]

From my parts and pieces box, I resurrected a 1940s Vacumatic in golden pearl. The cap I have for it will not thread onto the barrel. It appears that the threads on the barrel are gone. The cap does slide on but of course will not stay in place. Does anyone know if I can use a thin O ring as a seal so that the cap would seal and stay in place when stored with ink in it? I am thinking that it might work even if not perfectly.

I restored the fill system and it work perfectly. The nib that was on the pen was missing the end of one tine. I trimmed the fine nib into about a .8 - 1.0 stub and after polishing, the pen writes wonderfully. The pen is definitely user grade so I don't want to spend a lot of money restoring it. I would like to be able to fill and then cap when not in use. Currently, I am just dipping and cleaning after each writing session.

Thoughts and suggestions would be appreciated. Thanks!

[Ron Z]

No external threads at all, right? I think that its likely that the barrel for an Imperial Vacumatic, which had the threads on the end of the section instead of on the barrel. The Imperial Vac has a metal cap that looks much like a 51 cap, but has threads down at the end just before the inner cap.

 

I'll trade a standard barrel for this one....

[CraigR]

No external threads at all, right? I think that its likely that the barrel for an Imperial Vacumatic, which had the threads on the end of the section instead of on the barrel. The Imperial Vac has a metal cap that looks much like a 51 cap, but has threads down at the end just before the inner cap.

 

I'll trade a standard barrel for this one....

 

There is evidence of threads on this barrel, just worn down to where they do not engage with the threads inside the cap. Not an Imperial Vac.

[Ron Z]

That can often be fixed.

 

I would be leery of trying to use an 0-ring. It would tend to shift, and the outward pressure could damage the cap.

 

Have you tried another cap on the pen, or the cap on another pen?

[CraigR]

That can often be fixed.

 

I would be leery of trying to use an 0-ring. It would tend to shift, and the outward pressure could damage the cap.

 

Have you tried another cap on the pen, or the cap on another pen?

 

Yes, the cap works just fine on other vacs of that period. Other caps won't engage with the worn threads on the barrel. I doubt that this is the original cap, but it is in good condition with the blue diamond on the clip and a "wedding" band. I guess I could obtain a replacement barrel. What would be the cost (approx.) to restore the threads? Thanks for your help.

[woleizihan]

I would probably try this:

 

https://www.amazon.com/Loctite-Heavy-Duty-Threadlocker-Single/dp/B000I1RSNS/ref=asc_df_B000I1RSNS/?tag=hyprod-20&linkCode=df0&hvadid=198054161189&hvpos=1o1&hvnetw=g&hvrand=6915868876700051665&hvpone=&hvptwo=&hvqmt=&hvdev=t&hvdvcmdl=&hvlocint=&hvlocphy=9002242&hvtargid=pla-350863460111&psc=1

 

I've had some luck with my Kaweco sports by using it on the threads inside the cap,