[NSRCA-discussion] Aluminum 6-32 cap screws

[brian young]

Aluminium has poor fatigue properties compared to steel. 
   
  Depends on where you are using them and size you choose of course, I have used 1/4" aluminum screws for wing attachments.  I would be real nervous using aluminum screws for engine attachments in the size we use there.
   
  I have had steel engine screws fail attaching the engine to the beam. Im using 4-40 to hold my 1.60ys to the beams and they dont last, just havent upsized them. 

  Brian 
  
Bob Kane <getterflash at yahoo.com> wrote:
  Has anyone tried using 6-32 aluminum cap screws in
place of steel screws? I personally have never
observed a steel cap screw breaking under normal load.
A Hyde mount would also lower the maximum load on the
mounting screws. Curious. 

Bob Kane
getterflash at yahoo.com

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