1. 

   Greg Bender New

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   I'm looking for a boring bit/ counter bore for the anchor fastener on series 20 extrusion. It needs to be 11.8 mm . Does anybody know of a source?

    

   #1 Greg Bender, Sep 24, 2017
2. 

   Gary Caruso OpenBuilds Volunteer

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   Is it for this, Link to the part...?
   
   a 15/32" drill will do it.
   they recommend a drill guide (access hole jig), i can't find one for the 20 series!

    

   #2 Gary Caruso, Sep 28, 2017

   Last edited: Sep 28, 2017