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Threaded tubing inserts?? where can i find them??

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#1 whirlpoolm51

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Posted 10 December 2012 - 12:25 AM

I only know of one place to find threaded tube inserts and they are 5 dollars a piece!!! not my cup of tea to pay that much for somthing i know i can find somewhere else in bulk for cheaper and i need alot for my scope projects

anyone know of a nice place where i can easily get these in bulk and shipped fast and easy!!??? thanks!!

#2 Retsub

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Posted 10 December 2012 - 01:07 AM

Look hard in the online McMaster-Carr listing for various sizes ans shapes. *BW*

#3 JimMo

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Posted 10 December 2012 - 07:46 AM

Yes, I bought mine from McMaster-Carr, too. Link

#4 starman345

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Posted 10 December 2012 - 07:53 AM

I got mine Here

#5 MessiToM

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Posted 10 December 2012 - 08:22 AM

Do these induce any reduction in rigidity?

#6 starman345

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Posted 10 December 2012 - 08:51 AM

They are plenty rigid. I used them in my upper cage assembly to join the two rings, I can crank down the bolts pretty tight without problem. I suspect it would be almost impossible to pull one out.

#7 careysub

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Posted 10 December 2012 - 11:58 AM

Look hard in the online McMaster-Carr listing for various sizes ans shapes. *BW*


They are tricky to find in McMaster-Carr because they are called in that catalog "Tube Connecting Nuts", threaded tube inserts and variations on this bring up nothing.

These are used in bicycle frame building where they are called "star nuts". Type that into Google and you will get lots of suppliers for the bike market (this will also work in McMaster-Carr).

Other places that carry them:
http://www.meridiantelescopes.com/
http://www.dobstuff.com/
http://www.jwwinco.c...section7/gn992/
http://www.mjvail.co...lokrome/hk.html
http://www.marvolus...._double-fin.asp

Why aren't we calling the "star nuts"? We're astronomers for pete's sake! If we did we no one would have trouble finding them!

#8 whirlpoolm51

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Posted 10 December 2012 - 11:44 PM

Thanks everyone!! mcmaster-carr's prices are certainly the best i have found so i orderdd a bunch!! Theses things are plenty strong , once you put them in the pipe do not plan on pulling them out without a fight ahahahaha

#9 careysub

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Posted 11 December 2012 - 09:54 AM

Although you can't pull them out, you can push them farther in.

That is, if you find you pole too long, you can shorten it.






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