Seven 22 Pin

[per4manz]

Long time lurker who, until now, has found an answer to 99% of my questions on ECF without ever having to join or post. However, now I have a question I have been unable to find an answer to anywhere.

I recently purchased a Seven-22 as a step up from my trust MVP 1. Has been great, but wanted to move on to other attys and ohms that the MVP just cannot handle. I have been enjoying the 722 for a couple of weeks and have finally come to the conclusion that the only apparent weakness of the device is the center pin. I have noticed I have to adjust the center point out depending on the atty I am using. While typically not an issue with my kayfun Black, I have found that I have to take the pin so far out for my igo-w or protank that it will come completely loose. From what I can tell the screw is too short, although it looks like the 722 will take a longer pin. So, I have been looking for the screw size and threading so I can look for an appropriate replacement that will solve this problem once an for all. Unfortunately, I have no way of measuring the threading. Really a shame I have to do this, but if pioneer4you had been able to stick with the original spring-loaded design - or provided a slightly longer screw - this likely wouldn't be an issue.

Any help would be greatly appreciated.

 

[jimbill]

The 7-22 had to switch from the spring loaded pin to the screw pin because people were burning out the spring at low ohm's.Maybe you can find the right size screw at home depot or a lowes good luck.

 

[Mikeo]

Hi and welcome to ecf.

Take your screw to a local hardware store and they will measure the threads and tell you what you need. One of the big box home improvement stores may also do it for you, but I think you would have better luck a smaller hardware store.

Good luck....Mike

 

[sheishreviews]

If you have some calipers at home you can measure the screw, measure the width and measure the distance between the threads for the screw/bolt type.

 

[Weizenheimer]

You will want to make sure your replacement has the highest conductivity you can get

 

[Bunnykiller]

you might want to try a hobby shop that sell radio controlled airplanes etc. usually hobby shops of that nature carry a wide supply of miniature screws, fasteners... or a clock repair shop...

 

[per4manz]

Thanks for the replies, folks. The hardware stores did not have a gauge that could measure a screw this small. However, I was finally able to determine the measurements, which should be M3x0.5x4, although I could be off and it could be a M3x0.8x4. My plan is to purchase a couple of M3x0.5x6s, M3x0.5x8s, M3x0.8x6s and M3x0.8x8s to see how they do. Problem now is finding a high conductivity screw. I have thus far been unable to find gold or silver plated screws of this size outside of Chinese manufacturers who want a minimum order in the thousands. I also haven't been able to fins one that is cheesehead style.

 

[per4manz]

You will want to make sure your replacement has the highest conductivity you can get

Suggested materials?

 

[Weizenheimer]

I'm guessing copper makes the most sense? Maybe others will weigh in.