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  #1  
Old October 11th, 2014, 11:51 AM
tim
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Timothy Homewood
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Rivnuts

The 50th finally goes to the painters next week. Noting a few of the Rivnuts ( threaded inserts) holding on the light guards have caused some galvanic action, and themselves, rusted, what now?
Remove, paint first and replace with new ones ( alu or stainless). If so, can I drill them out?

Cheers,

Tim
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  #2  
Old October 11th, 2014, 11:57 AM
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Quote:
Originally Posted by tim View Post
The 50th finally goes to the painters next week. Noting a few of the Rivnuts ( threaded inserts) holding on the light guards have caused some galvanic action, and themselves, rusted, what now?
Remove, paint first and replace with new ones ( alu or stainless). If so, can I drill them out?

Cheers,

Tim
if you are putting them into aluminum use aluminum.
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  #3  
Old October 11th, 2014, 12:07 PM
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Bill Adams
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Don't drill them out unless you use the exact same size drill as the hole. You need to know the outside diameter of the rivnut body. If you drill the rivnut out and mess up the hole you'll never get another one in there properly.
Safest is to remove the light guards, remove the rivnuts and plug the holes with a plasic insert. Or use an expanding plastic nutsert if you must have them.
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  #4  
Old October 11th, 2014, 01:17 PM
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Brett Fritzler
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Use a Dremel and cut off wheel to cut a "+" into the top part of the Rivnut. Bend the pieces in and push the Rivnut through.
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Old October 11th, 2014, 06:32 PM
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I drilled a few out last week. I used a bit that was just bigger than the thread inside of the rivnut itself. I then gradually increased the size till the thing came apart. I then used that bit to remove the rest of them. Set new ones in and called it done.
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Old October 12th, 2014, 06:25 AM
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Cheers, unfortunately 3 of the ones in the upper front wings are spinning, thus getting the light guards off has turned into a project in itself...

Tim
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Old October 12th, 2014, 08:23 AM
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Rivnut can be drilled out without problems. I replace lotsa them on airplanes. The trick is to use a large drill bit. All you need to do is cut the outer lips. You won't be able to retrieve them out from the same side as you drill. They are like pop-rivet. If one starts to spin, just change the angle of the drill and it should stick. You might want to replace them with splined one or rivnut with a dot, need to cut a small dot on the hole and the dotted rivnut will be anchor in that hole so it won't spin.
If you have access to the back of the panel you can go for anchor nut, which are riveted on one or two places. Prevent them from spinning and are stronger.
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Old October 12th, 2014, 08:54 AM
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Quote:
Originally Posted by tim View Post
Cheers, unfortunately 3 of the ones in the upper front wings are spinning, thus getting the light guards off has turned into a project in itself...

Tim
Had that problem. A drill doesn't do much when the part your trying to drill just spins. That's why I used a Dremel and small cut off wheel to remove the screw and Rivnut.
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Old October 12th, 2014, 09:02 AM
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Okay, different problem same issue. The PO hacksawed the nut leaving the metal in the hole! Took the guards off an sold them. So how o I get those out?
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  #10  
Old October 12th, 2014, 09:57 AM
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Get access to the back of them with a pair of long nose vice grips to hold them and then drill or Dremel them as mentioned
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