Sunday, March 17, 2024

One More Data Request

 I need something stainless steel that is round and threaded on the inside 1/4"-20.  Again, it will be epoxied into a hole in carbon fiber.  The screw needs to go through this fitting in 3/8" thick carbon fiber.  It will be pressing against another component so a spacer will not do the trick.


I am not finding anything.  Becaus I only need one, I will cut a 3/8" long piece of 1/2" diameter stainless rod, square it on the lathe, then drill and tap it 1/4""-20.

Excellent replies!  Thank you all.

9 comments:

  1. Something like https://www.mcmaster.com/products/threaded-inserts/press-fit-threaded-inserts-for-composites/?

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  2. https://www.summitracing.com/parts/sum-g1695?srsltid=AfmBOooI1QW5m7nX0d0FijfWFrEr2pSqVtLcki9Ywbl8xK9QZRaIKKY3qPE

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  3. Not round, but could you use a couple of 1/4-20 stainless hex nuts, since they will be epoxied in place?

    https://www.homedepot.com/p/1-4-in-20-Stainless-Steel-Hex-Nut-4-Pack-825801/317478972

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    Replies
    1. I thought about that. These other suggestions are better, however.

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  4. https://www.mcmaster.com/products/furniture-fasteners/system-of-measurement~inch/material~stainless-steel-2/threaded-insert-type~press-fit/

    https://www.mcfeelys.com/screw-fastener-web-store/nuts/threaded-inserts.html?screw_material=4645

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  5. There are threaded inserts for wood.. 1/4-20 interior thread, beefy exterior wood thread, but they are all more than 3/8 inch long and you have buy a pack. The length of 5/8 means you would have to mill it to length.

    If you only need one, and you have the stock or scrap that will work, your plan may be best...

    ReplyDelete