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Peculiar looking rivet

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TRMark

TRMark

Jedi Knight
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I am still working on my old sports/racer. The front drums use a magnesium backing plate with an air scoop and brass wire mesh to prevent intrusion of debris into the brakes. I have to replace the mesh which is held in place with this aluminum fastener, I guess you would call it a rivet. It is 3/32" dia. Any ideas of where I can find something like this. I could use a screw, but I would like to be as original as possible.

3449070544_d941358e60.jpg


The rivets go in the holes on either side of the kind of oblong openings.

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Pictures of project. Gemini
 
I think we got them at work from McMaster/Carr or Grainger. Used them to install motor number plates.
 
Thanks leecreek. I looked around in the mcmaster/carr website till at least found out what they are called, "type U drive screws". Now I just need to find them in aluminum. So far no luck.
 
I've never seen them in anything but steel. They are fairly common in holding info. plates to metal castings. When driven in a hole in the casting, they cut spiral groves which holds them in place. I don't think aluminum would be tough enough do that. JMHO. PJ
 
Ours were stainless. Held well in cast iron. Acid plant environment.
 
Still haven't decided what to do, can't seem to find the rivet in aluminum as original. I want to be careful not to damage the back plate. It is magnesium and probably unobtainium.
 
Mark - was just looking at my Spanaur Catalogue. They have the Type U screw but, as mentioned, only in steel and stainless.

They do have aluminum drive rivets - they don't have the threads - just a pin that is driven into the rivet to spread the back but it could be a solution that looks the same and doesn't risk damage to the back plate.
 
Wow, hadn't heard of Spanaur before, lot of stuff in the catalog. I don't want to use an expanding type rivet as it will expand inside the casting, I am worried about breaking it. I will probably look for a screw. Thank you for your help and the new source of hard to get stuff.
 
Mark, if you need me to pick anything up, I'd be happy to and send it on
 
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