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<p class="MsoNormal">I think the trick here will be to only drill the hole for the helicoil and not go all the way through. Then the helicoil can bottom out in the hole and you can break off the tab.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">If you were to just tap the hole itself, you would use coarse thread. but my machinist friend says you should use a fine thread helicoil inside the hole.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">FYI this article is pretty descriptive on what to use. I think it verifies what I said above, noting that a helicoil is pretty high strength steel, even though it is sitting in a softer material.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><a href="https://screwrld.com/blogs/about-fasteners-world/coarse-vs-fine-thread-understanding-the-key-differences-for-optimal-fastening">https://screwrld.com/blogs/about-fasteners-world/coarse-vs-fine-thread-understanding-the-key-differences-for-optimal-fastening</a><o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I’m planning to document this; look for it in 6-Pack magazine.<o:p></o:p></p>
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