Mounting Studs great for spar

These ideas are great for mounting just about anything light and electronic in the airplane, just a couple of different takes.

Jorge Bujanda

 This came to mind as a comment on another topic but think is better to separate it to a different thread. 
 Here is my approach to surface mounting all around my airplane, including the main spar and firewall.  
 It minimized any   holes, anywhere, unless necessary.  I finished my third annual in December and everything is as tight
 as when I installed it.  Reiff/Stephen, here is newsletter material you can use when convenient.
 [Jorge's Blog]

Andy Millin

 FWIW, I used these.  http://www.mcmaster.com/#perforated-base-studs/=vsmgjs
   
 They are about  75 cents a piece.
   
 Andy