Weird screw, keyed screw

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Old 08-20-10, 08:29 PM
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Weird screw, keyed screw

I need to know where I can find this screw that I have.

I'm working on a project where we need a very small shaft with a keyed section on it, similar to this:

http://www.ssiworld.com/images/design/keyed_shaft.jpg

I found a screw in my workspace that has a keyed section on it. I made a drawing of it so that you can see what it looks like. It's approximately 1 inch long.

http://i252.photobucket.com/albums/h...keyedscrew.jpg

What is this called, and where can I buy these screws or shafts?

I've looked on McMaster-Carr and couldn't find anything. I can't even find this on google.

Thanks for any feedback.
 
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Old 08-21-10, 11:34 AM
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Do either of these help?

stainless csk with wings screws
http://www.chinaselfdrilling.co/Arti...?ArticleID=249

They are called reamer wings when on a self tapping screw, and one site calls them "relief wings" when above the threads.
 
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