Plastic undercut fastener 1

[gregbaum]

I want to fasten a flexible elastomeric sheet to a nylon sheet.
I've prototyped some single firtree type fasteners as part of the elastomer, which poke through the nylon and hold in place. Other than trial and error, is there a more calculated approach to specifing the firtree/hole size?

 

[CoryPad]

These type of parts tend to be engineered by the manufacturer (such as ITW) and the end user uses the recommeded hole size for that part.

Regards,

Cory

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