Remember to use washers and not over tighten

[Mr V]

Originally Posted by Peter Matteson

Thats what happens when you use the wrong fastener for that function.

You should use Riv-nuts/Rivet-nut/Clinch nuts in that type of situation to prevent that possibility of that happening. In industry that is called mistake-proofing because the failure is inherently by design.

http://www.mcmaster.com/#standard-rivet-nuts/=g6da7w

I've been fighting to use rivet nuts for some time and out head Coach/Advisor just didn't believe that they were robust enough. So the other day when one of the other mentors was saying how their sub-team wanted to use them but were being over-ruled I devised a little test to show that they won't pull through.

In this blog post on our website you'll see a picture of a properly installed steel rivet nut from Mc-Master http://www.mcmaster.com/#95105A127 that was subject to attempted destructive testing. It was installed properly and a bolt threaded into it. Then we placed it in the hydraulic press and proceeded to push on the bolt from the back side. The 1/8" aluminum that was over an aprox 1.5" x 1.5" hole deformed first, once it started to tilt the bolt then deformed but there was zero sign of the rivet nut wanting to push through the material.