Rivnut question

[surfsup]

First time buying these I hope I got the right ones. I wanted to buy some that I could mount using a drill and a hex bolt by reverse tightening it to compress the rivnut onto the chassis metal flange.

I just got em in from McMaster and they look kinda beefy. Is this the right one?

[surfsup]

This is the link...

http://www.mcmaster.com/#catalog/118/3295/=hv40qn

I don't have a spare chassis to test this on so hence the question. If it doesnt work i'd hat to scrap the chassis (already build the amp).[/b]

[martin manning]

What thread size did you get? 10-32 would be typical.

[Jana]

That might work, I would try it on a piece of scrap though. Any old piece of metal about the same thickness would work to test it. I would certainly put some oil on the threads if you are going to try to compress it like that. Usually it is threaded onto a tool that then pulls the spindle to compress it.

Another option is a nut plate.
http://www.aircraftfast.com/MS21059.htm ... RQodFV-lqg

I prefer these over rivnuts. If a rivnut isn't compressed firmly, it can spin when you try to remove the screw. That can be a real pain to get the screw out--especially with an amp where you can't get inside to hold the rivnut with a pliers.

[Phil_S]

Cool video on a similar product:
http://www.enfasco.com/atlas-fasteners. ... OgodqGT8nw

[surfsup]

Jana good point on spinning, that will suuuuuck! Matrin the threads are 10-32 as you guessed. I think it will be fine, i'm gonna go formit. After finding my 19/64 drillbit, i have them all drilled and inserted. Here's what i'm going to do...

Take a 10-32 bolt, thread a nut on it half way, then a washer, big thick one. Then thread the bold into the rivnet that is inserted. Then, i will tighten the Nut to pull the rivnut base up and compress it. This won't create friction on the threads from turning the bolt, evenly pulling and compressing the base. Hope it works!

[martin manning]

Get a quality bolt for your setting tool- Grade 8 and lubricate the surfaces that take the load, and hold the bolt to keep it from turning while you tighten the nut. A socket-head cap screw would be a good choice.

[Prairie Dawg]

Those things caused generations of aircraft mechanics to tear their hair out and curse BF Goodrich. They developed them so 'tis said. Only exceeded in wretchedness by Tinnermann nuts.